diff --git a/ui-ngx/src/app/modules/home/pages/admin/oauth2/clients/client-dialog.component.ts b/ui-ngx/src/app/modules/home/pages/admin/oauth2/clients/client-dialog.component.ts
index 4bd0aa7f28..a4d6b7bf5e 100644
--- a/ui-ngx/src/app/modules/home/pages/admin/oauth2/clients/client-dialog.component.ts
+++ b/ui-ngx/src/app/modules/home/pages/admin/oauth2/clients/client-dialog.component.ts
@@ -14,13 +14,13 @@
 /// limitations under the License.
 ///
 
-import { Component, OnDestroy, SkipSelf, ViewChild } from '@angular/core';
+import { AfterViewInit, Component, OnDestroy, SkipSelf, ViewChild } from '@angular/core';
 import { DialogComponent } from '@shared/components/dialog.component';
 import { Store } from '@ngrx/store';
 import { AppState } from '@core/core.state';
 import { Router } from '@angular/router';
 import { MatDialogRef } from '@angular/material/dialog';
-import { FormBuilder, FormGroupDirective, NgForm, UntypedFormControl } from '@angular/forms';
+import { FormGroupDirective, NgForm, UntypedFormControl } from '@angular/forms';
 import { getProviderHelpLink, OAuth2Client } from '@shared/models/oauth2.models';
 import { OAuth2Service } from '@core/http/oauth2.service';
 import { ClientComponent } from '@home/pages/admin/oauth2/clients/client.component';
@@ -32,7 +32,7 @@ import { ErrorStateMatcher } from '@angular/material/core';
   providers: [{provide: ErrorStateMatcher, useExisting: ClientDialogComponent}],
   styleUrls: []
 })
-export class ClientDialogComponent extends DialogComponent<ClientDialogComponent, OAuth2Client> implements OnDestroy {
+export class ClientDialogComponent extends DialogComponent<ClientDialogComponent, OAuth2Client> implements OnDestroy, AfterViewInit {
 
   submitted = false;
 
@@ -41,7 +41,6 @@ export class ClientDialogComponent extends DialogComponent<ClientDialogComponent
   constructor(protected store: Store<AppState>,
               protected router: Router,
               protected dialogRef: MatDialogRef<ClientDialogComponent, OAuth2Client>,
-              private fb: FormBuilder,
               private oauth2Service: OAuth2Service,
               @SkipSelf() private errorStateMatcher: ErrorStateMatcher) {
     super(store, router, dialogRef);
diff --git a/ui-ngx/src/app/modules/home/pages/admin/oauth2/clients/client.component.ts b/ui-ngx/src/app/modules/home/pages/admin/oauth2/clients/client.component.ts
index 2662b97c65..a66d1592d9 100644
--- a/ui-ngx/src/app/modules/home/pages/admin/oauth2/clients/client.component.ts
+++ b/ui-ngx/src/app/modules/home/pages/admin/oauth2/clients/client.component.ts
@@ -14,7 +14,7 @@
 /// limitations under the License.
 ///
 
-import { ChangeDetectorRef, Component, Inject, Input, Optional } from '@angular/core';
+import { ChangeDetectorRef, Component, Inject, Input, OnDestroy, Optional } from '@angular/core';
 import { EntityComponent } from '@home/components/entity/entity.component';
 import {
   ClientAuthenticationMethod,
@@ -54,7 +54,7 @@ import { coerceBoolean } from '@app/shared/decorators/coercion';
   templateUrl: './client.component.html',
   styleUrls: ['./client.component.scss']
 })
-export class ClientComponent extends EntityComponent<OAuth2Client, PageLink, OAuth2ClientInfo> {
+export class ClientComponent extends EntityComponent<OAuth2Client, PageLink, OAuth2ClientInfo> implements OnDestroy {
 
   @Input()
   @coerceBoolean()
@@ -109,7 +109,8 @@ export class ClientComponent extends EntityComponent<OAuth2Client, PageLink, OAu
               protected translate: TranslateService,
               private oauth2Service: OAuth2Service,
               @Optional() @Inject('entity') protected entityValue: OAuth2Client,
-              @Optional() @Inject('entitiesTableConfig') protected entitiesTableConfigValue: EntityTableConfig<OAuth2Client, PageLink, OAuth2ClientInfo>,
+              @Optional() @Inject('entitiesTableConfig')
+                protected entitiesTableConfigValue: EntityTableConfig<OAuth2Client, PageLink, OAuth2ClientInfo>,
               protected cd: ChangeDetectorRef,
               public fb: UntypedFormBuilder) {
     super(store, fb, entityValue, entitiesTableConfigValue, cd);
@@ -185,13 +186,13 @@ export class ClientComponent extends EntityComponent<OAuth2Client, PageLink, OAu
     if (entity.scope.length === scopeControls.length) {
       scopeControls.patchValue(entity.scope, {emitEvent: false});
     } else {
-      const scopeControls: Array<AbstractControl> = [];
+      const newScopeControls: Array<AbstractControl> = [];
       if (entity.scope) {
         for (const scope of entity.scope) {
-          scopeControls.push(this.fb.control(scope, [Validators.required]));
+          newScopeControls.push(this.fb.control(scope, [Validators.required]));
         }
       }
-      this.entityForm.setControl('scope', this.fb.array(scopeControls));
+      this.entityForm.setControl('scope', this.fb.array(newScopeControls));
     }
   }
 
diff --git a/ui-ngx/src/app/modules/home/pages/admin/oauth2/clients/clients-table-config.resolver.ts b/ui-ngx/src/app/modules/home/pages/admin/oauth2/clients/clients-table-config.resolver.ts
index 178b817175..a5993bc773 100644
--- a/ui-ngx/src/app/modules/home/pages/admin/oauth2/clients/clients-table-config.resolver.ts
+++ b/ui-ngx/src/app/modules/home/pages/admin/oauth2/clients/clients-table-config.resolver.ts
@@ -27,7 +27,6 @@ import {
   OAuth2ClientInfo,
   platformTypeTranslations
 } from '@shared/models/oauth2.models';
-import { UtilsService } from '@core/services/utils.service';
 import { TranslateService } from '@ngx-translate/core';
 import { DatePipe } from '@angular/common';
 import { EntityType, entityTypeTranslations } from '@shared/models/entity-type.models';
@@ -40,11 +39,11 @@ import { PageLink } from '@shared/models/page/page-link';
 @Injectable()
 export class ClientsTableConfigResolver implements Resolve<EntityTableConfig<OAuth2Client, PageLink, OAuth2ClientInfo>> {
 
-  private readonly config: EntityTableConfig<OAuth2Client, PageLink, OAuth2ClientInfo> = new EntityTableConfig<OAuth2Client, PageLink, OAuth2ClientInfo>();
+  private readonly config: EntityTableConfig<OAuth2Client, PageLink, OAuth2ClientInfo> =
+    new EntityTableConfig<OAuth2Client, PageLink, OAuth2ClientInfo>();
 
   constructor(private translate: TranslateService,
               private datePipe: DatePipe,
-              private utilsService: UtilsService,
               private oauth2Service: OAuth2Service) {
     this.config.tableTitle = this.translate.instant('admin.oauth2.clients');
     this.config.selectionEnabled = false;
@@ -53,9 +52,7 @@ export class ClientsTableConfigResolver implements Resolve<EntityTableConfig<OAu
     this.config.entityTranslations = entityTypeTranslations.get(EntityType.OAUTH2_CLIENT);
     this.config.entityResources = {
       helpLinkId: null,
-      helpLinkIdForEntity(entity: OAuth2Client): string {
-        return getProviderHelpLink(entity.additionalInfo.providerName);
-      }
+      helpLinkIdForEntity: (entity: OAuth2Client) => getProviderHelpLink(entity.additionalInfo.providerName)
     };
     this.config.entityComponent = ClientComponent;
     this.config.headerComponent = ClientTableHeaderComponent;
@@ -66,20 +63,16 @@ export class ClientsTableConfigResolver implements Resolve<EntityTableConfig<OAu
       new DateEntityTableColumn<OAuth2ClientInfo>('createdTime', 'common.created-time', this.datePipe, '170px'),
       new EntityTableColumn<OAuth2ClientInfo>('title', 'admin.oauth2.title', '350px'),
       new EntityTableColumn<OAuth2ClientInfo>('platforms', 'admin.oauth2.allowed-platforms', '100%',
-        (clientInfo) => {
-          return clientInfo.platforms && clientInfo.platforms.length ?
-            clientInfo.platforms.map(platform => this.translate.instant(platformTypeTranslations.get(platform))).join(', ') :
-            this.translate.instant('admin.oauth2.all-platforms');
-        }, () => ({}), false)
+        (clientInfo) => clientInfo.platforms && clientInfo.platforms.length ?
+          clientInfo.platforms.map(platform => this.translate.instant(platformTypeTranslations.get(platform))).join(', ') :
+          this.translate.instant('admin.oauth2.all-platforms'), () => ({}), false)
     );
 
     this.config.deleteEntityTitle = (client) => this.translate.instant('admin.oauth2.delete-client-title', {clientName: client.title});
     this.config.deleteEntityContent = () => this.translate.instant('admin.oauth2.delete-client-text');
     this.config.entitiesFetchFunction = pageLink => this.oauth2Service.findTenantOAuth2ClientInfos(pageLink);
     this.config.loadEntity = id => this.oauth2Service.getOAuth2ClientById(id.id);
-    this.config.saveEntity = client => {
-      return this.oauth2Service.saveOAuth2Client(client);
-    }
+    this.config.saveEntity = client => this.oauth2Service.saveOAuth2Client(client);
     this.config.deleteEntity = id => this.oauth2Service.deleteOauth2Client(id.id);
   }
 
diff --git a/ui-ngx/src/app/modules/home/pages/admin/oauth2/domains/domain-table-config.resolver.ts b/ui-ngx/src/app/modules/home/pages/admin/oauth2/domains/domain-table-config.resolver.ts
index 7680a5d502..5e2cb5f9ad 100644
--- a/ui-ngx/src/app/modules/home/pages/admin/oauth2/domains/domain-table-config.resolver.ts
+++ b/ui-ngx/src/app/modules/home/pages/admin/oauth2/domains/domain-table-config.resolver.ts
@@ -33,7 +33,7 @@ import { DomainComponent } from '@home/pages/admin/oauth2/domains/domain.compone
 import { isEqual } from '@core/utils';
 import { DomainTableHeaderComponent } from '@home/pages/admin/oauth2/domains/domain-table-header.component';
 import { Direction } from '@app/shared/models/page/sort-order';
-import { map } from 'rxjs';
+import { map, Observable, of, mergeMap } from 'rxjs';
 
 @Injectable()
 export class DomainTableConfigResolver implements Resolve<EntityTableConfig<DomainInfo>> {
@@ -87,18 +87,22 @@ export class DomainTableConfigResolver implements Resolve<EntityTableConfig<Doma
     this.config.loadEntity = id => this.domainService.getDomainInfoById(id.id);
     this.config.saveEntity = (domain, originalDomain) => {
       const clientsIds = domain.oauth2ClientInfos as Array<string> || [];
+      let clientsTask: Observable<void>;
       if (domain.id && !isEqual(domain.oauth2ClientInfos?.sort(),
         originalDomain.oauth2ClientInfos?.map(info => info.id ? info.id.id : info).sort())) {
-        this.domainService.updateOauth2Clients(domain.id.id, clientsIds).subscribe();
+        clientsTask = this.domainService.updateOauth2Clients(domain.id.id, clientsIds);
+      } else {
+        clientsTask = of(null);
       }
       delete domain.oauth2ClientInfos;
-      return this.domainService.saveDomain(domain, domain.id ? [] : clientsIds).pipe(
-        map(domain => {
-          (domain as DomainInfo).oauth2ClientInfos = clientsIds;
-          return domain;
+      return clientsTask.pipe(
+        mergeMap(() => this.domainService.saveDomain(domain, domain.id ? [] : clientsIds)),
+        map(savedDomain => {
+          (savedDomain as DomainInfo).oauth2ClientInfos = clientsIds;
+          return savedDomain;
         })
       );
-    }
+    };
     this.config.deleteEntity = id => this.domainService.deleteDomain(id.id);
   }
 
diff --git a/ui-ngx/src/app/modules/home/pages/admin/oauth2/domains/domain.component.html b/ui-ngx/src/app/modules/home/pages/admin/oauth2/domains/domain.component.html
index eaa85ce87a..f95087b3f4 100644
--- a/ui-ngx/src/app/modules/home/pages/admin/oauth2/domains/domain.component.html
+++ b/ui-ngx/src/app/modules/home/pages/admin/oauth2/domains/domain.component.html
@@ -54,10 +54,9 @@
   <tb-entity-list [entityType]="entityType.OAUTH2_CLIENT" formControlName="oauth2ClientInfos"
                   labelText="{{ 'admin.oauth2.clients' | translate }}"
                   placeholderText="{{ 'admin.oauth2.add-client' | translate }}">
-    <button #createTargetButton
-            mat-button color="primary" matSuffix
+    <button mat-button color="primary" matSuffix
             [disabled]="!isEdit"
-            (click)="createClient($event, createTargetButton)">
+            (click)="createClient($event)">
       <span style="white-space: nowrap">{{ 'admin.oauth2.create-new' | translate }}</span>
     </button>
   </tb-entity-list>
diff --git a/ui-ngx/src/app/modules/home/pages/admin/oauth2/domains/domain.component.ts b/ui-ngx/src/app/modules/home/pages/admin/oauth2/domains/domain.component.ts
index d54c969bfe..dcfd243d81 100644
--- a/ui-ngx/src/app/modules/home/pages/admin/oauth2/domains/domain.component.ts
+++ b/ui-ngx/src/app/modules/home/pages/admin/oauth2/domains/domain.component.ts
@@ -26,7 +26,6 @@ import { Store } from '@ngrx/store';
 import { UntypedFormBuilder, UntypedFormGroup, Validators } from '@angular/forms';
 import { WINDOW } from '@core/services/window.service';
 import { isDefinedAndNotNull } from '@core/utils';
-import { MatButton } from '@angular/material/button';
 import { MatDialog } from '@angular/material/dialog';
 import { ClientDialogComponent } from '@home/pages/admin/oauth2/clients/client-dialog.component';
 import { EntityType } from '@shared/models/entity-type.models';
@@ -38,7 +37,7 @@ import { EntityType } from '@shared/models/entity-type.models';
 })
 export class DomainComponent extends EntityComponent<DomainInfo> {
 
-  private loginProcessingUrl: string = '';
+  private loginProcessingUrl = '';
 
   entityType = EntityType;
 
@@ -83,7 +82,7 @@ export class DomainComponent extends EntityComponent<DomainInfo> {
     return domainName !== '' ? `${domainName}${this.loginProcessingUrl}` : '';
   }
 
-  createClient($event: Event, button: MatButton) {
+  createClient($event: Event) {
     if ($event) {
       $event.stopPropagation();
       $event.preventDefault();
diff --git a/ui-ngx/src/app/modules/home/pages/admin/oauth2/mobile-apps/mobile-app-table-config.resolver.ts b/ui-ngx/src/app/modules/home/pages/admin/oauth2/mobile-apps/mobile-app-table-config.resolver.ts
index 625a0ad9b4..072fac02c4 100644
--- a/ui-ngx/src/app/modules/home/pages/admin/oauth2/mobile-apps/mobile-app-table-config.resolver.ts
+++ b/ui-ngx/src/app/modules/home/pages/admin/oauth2/mobile-apps/mobile-app-table-config.resolver.ts
@@ -25,7 +25,6 @@ import {
   EntityTableConfig
 } from '@home/models/entity/entities-table-config.models';
 import { MobileApp, MobileAppInfo } from '@shared/models/oauth2.models';
-import { UtilsService } from '@core/services/utils.service';
 import { TranslateService } from '@ngx-translate/core';
 import { DatePipe } from '@angular/common';
 import { EntityType, entityTypeResources, entityTypeTranslations } from '@shared/models/entity-type.models';
@@ -34,7 +33,7 @@ import { Direction } from '@app/shared/models/page/sort-order';
 import { MobileAppService } from '@core/http/mobile-app.service';
 import { MobileAppComponent } from '@home/pages/admin/oauth2/mobile-apps/mobile-app.component';
 import { MobileAppTableHeaderComponent } from '@home/pages/admin/oauth2/mobile-apps/mobile-app-table-header.component';
-import { map } from 'rxjs';
+import { map, Observable, of, mergeMap } from 'rxjs';
 
 @Injectable()
 export class MobileAppTableConfigResolver implements Resolve<EntityTableConfig<MobileAppInfo>> {
@@ -43,7 +42,6 @@ export class MobileAppTableConfigResolver implements Resolve<EntityTableConfig<M
 
   constructor(private translate: TranslateService,
               private datePipe: DatePipe,
-              private utilsService: UtilsService,
               private mobileAppService: MobileAppService) {
     this.config.tableTitle = this.translate.instant('admin.oauth2.mobile-apps');
     this.config.selectionEnabled = false;
@@ -66,7 +64,7 @@ export class MobileAppTableConfigResolver implements Resolve<EntityTableConfig<M
           name: this.translate.instant('admin.oauth2.copy-mobile-app-secret'),
           icon: 'content_copy',
           style: {
-            'padding-top': '1px',
+            padding: '4px',
             'font-size': '16px',
             color: 'rgba(0,0,0,.87)'
           },
@@ -93,18 +91,22 @@ export class MobileAppTableConfigResolver implements Resolve<EntityTableConfig<M
     this.config.loadEntity = id => this.mobileAppService.getMobileAppInfoById(id.id);
     this.config.saveEntity = (mobileApp, originalMobileApp) => {
       const clientsIds = mobileApp.oauth2ClientInfos as Array<string> || [];
+      let clientsTask: Observable<void>;
       if (mobileApp.id && !isEqual(mobileApp.oauth2ClientInfos?.sort(),
         originalMobileApp.oauth2ClientInfos?.map(info => info.id ? info.id.id : info).sort())) {
-        this.mobileAppService.updateOauth2Clients(mobileApp.id.id, clientsIds).subscribe();
+        clientsTask = this.mobileAppService.updateOauth2Clients(mobileApp.id.id, clientsIds);
+      } else {
+        clientsTask = of(null);
       }
       delete mobileApp.oauth2ClientInfos;
-      return this.mobileAppService.saveMobileApp(mobileApp as MobileApp, mobileApp.id ? [] : clientsIds).pipe(
-        map(mobileApp => {
-          (mobileApp as MobileAppInfo).oauth2ClientInfos = clientsIds;
-          return mobileApp;
+      return clientsTask.pipe(
+        mergeMap(() => this.mobileAppService.saveMobileApp(mobileApp as MobileApp, mobileApp.id ? [] : clientsIds)),
+        map(savedMobileApp => {
+          (savedMobileApp as MobileAppInfo).oauth2ClientInfos = clientsIds;
+          return savedMobileApp;
         })
       );
-    }
+    };
     this.config.deleteEntity = id => this.mobileAppService.deleteMobileApp(id.id);
   }
 
diff --git a/ui-ngx/src/app/modules/home/pages/admin/oauth2/mobile-apps/mobile-app.component.html b/ui-ngx/src/app/modules/home/pages/admin/oauth2/mobile-apps/mobile-app.component.html
index afec8125c3..a613890c95 100644
--- a/ui-ngx/src/app/modules/home/pages/admin/oauth2/mobile-apps/mobile-app.component.html
+++ b/ui-ngx/src/app/modules/home/pages/admin/oauth2/mobile-apps/mobile-app.component.html
@@ -28,6 +28,9 @@
       <mat-error *ngIf="entityForm.get('pkgName').hasError('maxlength')">
         {{ 'admin.oauth2.mobile-package-max-length' | translate }}
       </mat-error>
+      <mat-error *ngIf="entityForm.get('pkgName').hasError('pattern')">
+        {{ 'admin.oauth2.mobile-package-spaces' | translate }}
+      </mat-error>
     </mat-form-field>
   </div>
   <div class="tb-form-row tb-standard-fields no-border no-padding">
@@ -63,10 +66,9 @@
   <tb-entity-list [entityType]="entityType.OAUTH2_CLIENT" formControlName="oauth2ClientInfos"
                   labelText="{{ 'admin.oauth2.clients' | translate }}"
                   placeholderText="{{ 'admin.oauth2.add-client' | translate }}">
-    <button #createTargetButton
-            mat-button color="primary" matSuffix
+    <button mat-button color="primary" matSuffix
             [disabled]="!isEdit"
-            (click)="createClient($event, createTargetButton)">
+            (click)="createClient($event)">
       <span style="white-space: nowrap">{{ 'admin.oauth2.create-new' | translate }}</span>
     </button>
   </tb-entity-list>
diff --git a/ui-ngx/src/app/modules/home/pages/admin/oauth2/mobile-apps/mobile-app.component.ts b/ui-ngx/src/app/modules/home/pages/admin/oauth2/mobile-apps/mobile-app.component.ts
index 9f90a96621..a01699bdda 100644
--- a/ui-ngx/src/app/modules/home/pages/admin/oauth2/mobile-apps/mobile-app.component.ts
+++ b/ui-ngx/src/app/modules/home/pages/admin/oauth2/mobile-apps/mobile-app.component.ts
@@ -19,14 +19,11 @@ import { ChangeDetectorRef, Component, Inject } from '@angular/core';
 import { EntityComponent } from '@home/components/entity/entity.component';
 import { MobileAppInfo } from '@shared/models/oauth2.models';
 import { AppState } from '@core/core.state';
-import { OAuth2Service } from '@core/http/oauth2.service';
 import { EntityTableConfig } from '@home/models/entity/entities-table-config.models';
 import { TranslateService } from '@ngx-translate/core';
 import { Store } from '@ngrx/store';
 import { UntypedFormBuilder, UntypedFormControl, UntypedFormGroup, Validators } from '@angular/forms';
-import { WINDOW } from '@core/services/window.service';
 import { isDefinedAndNotNull, randomAlphanumeric } from '@core/utils';
-import { MatButton } from '@angular/material/button';
 import { MatDialog } from '@angular/material/dialog';
 import { ClientDialogComponent } from '@home/pages/admin/oauth2/clients/client-dialog.component';
 import { EntityType } from '@shared/models/entity-type.models';
@@ -42,19 +39,18 @@ export class MobileAppComponent extends EntityComponent<MobileAppInfo> {
 
   constructor(protected store: Store<AppState>,
               protected translate: TranslateService,
-              private oauth2Service: OAuth2Service,
               @Inject('entity') protected entityValue: MobileAppInfo,
               @Inject('entitiesTableConfig') protected entitiesTableConfigValue: EntityTableConfig<MobileAppInfo>,
               protected cd: ChangeDetectorRef,
               public fb: UntypedFormBuilder,
-              @Inject(WINDOW) private window: Window,
               private dialog: MatDialog) {
     super(store, fb, entityValue, entitiesTableConfigValue, cd);
   }
 
   buildForm(entity: MobileAppInfo): UntypedFormGroup {
     return this.fb.group({
-      pkgName: [entity?.pkgName ? entity.pkgName : '', [Validators.required, Validators.maxLength(255)]],
+      pkgName: [entity?.pkgName ? entity.pkgName : '', [Validators.required, Validators.maxLength(255),
+        Validators.pattern(/^\S+$/)]],
       appSecret: [entity?.appSecret ? entity.appSecret : btoa(randomAlphanumeric(64)),
         [Validators.required, this.base64Format]],
       oauth2Enabled: isDefinedAndNotNull(entity?.oauth2Enabled) ? entity.oauth2Enabled : true,
@@ -68,10 +64,10 @@ export class MobileAppComponent extends EntityComponent<MobileAppInfo> {
       appSecret: entity.appSecret,
       oauth2Enabled: entity.oauth2Enabled,
       oauth2ClientInfos: entity.oauth2ClientInfos?.map(info => info.id ? info.id.id : info)
-    })
+    });
   }
 
-  createClient($event: Event, button: MatButton) {
+  createClient($event: Event) {
     if ($event) {
       $event.stopPropagation();
       $event.preventDefault();
diff --git a/ui-ngx/src/assets/locale/locale.constant-en_US.json b/ui-ngx/src/assets/locale/locale.constant-en_US.json
index f5f26beeeb..fbd3765415 100644
--- a/ui-ngx/src/assets/locale/locale.constant-en_US.json
+++ b/ui-ngx/src/assets/locale/locale.constant-en_US.json
@@ -323,6 +323,7 @@
           "mobile-package-hint": "For Android: your own unique Application ID. For iOS: Product bundle identifier.",
           "mobile-package-unique": "Application package must be unique.",
           "mobile-package-max-length": "Application package should be less than 256",
+          "mobile-package-spaces": "Application package should not contain spaces",
           "mobile-app-secret": "Application secret",
           "mobile-app-secret-hint": "Base64 encoded string representing at least 512 bits of data.",
           "mobile-app-secret-required": "Application secret is required.",