diff --git a/src/Squidex/Startup.cs b/src/Squidex/Startup.cs
index 55e56f5fe..69eea2e7a 100644
--- a/src/Squidex/Startup.cs
+++ b/src/Squidex/Startup.cs
@@ -68,7 +68,6 @@ namespace Squidex
             services.AddMemoryCache();
             services.AddOptions();
             services.AddRouting();
-            services.AddResponseCompression();
             services.AddWebpackBuilder();
 
             services.Configure<MyMongoDbOptions>(
@@ -95,8 +94,6 @@ namespace Squidex
             loggerFactory.AddConsole();
             loggerFactory.AddDebug();
 
-            app.UseResponseCompression();
-
             if (!Environment.IsDevelopment())
             {
                 app.UseMiddleware<SingleUrlsMiddleware>();
@@ -185,7 +182,6 @@ namespace Squidex
                     headers.CacheControl = new CacheControlHeaderValue
                     {
                         MaxAge = TimeSpan.FromDays(60),
-            
                     };
                 }
             });
diff --git a/src/Squidex/app-config/webpack.run.prod.js b/src/Squidex/app-config/webpack.run.prod.js
index 5b9a5bb4f..cf9a21566 100644
--- a/src/Squidex/app-config/webpack.run.prod.js
+++ b/src/Squidex/app-config/webpack.run.prod.js
@@ -57,7 +57,7 @@ module.exports = webpackMerge.smart(runConfig, {
                 loader: ExtractTextPlugin.extract({ fallbackLoader: 'style', loader: 'css!sass?sourceMap' })
             }, {
                 test: /\.(png|jpe?g|gif|svg|ico)(\?.*$|$)/,
-                loaders: ['file?hash=sha512&digest=hex&name=[hash].[ext]', 'image-webpack?bypassOnDebug&optimizationLevel=7&interlaced=false']
+                loaders: ['file?hash=sha512&digest=hex&name=assets/[name].[hash].[ext]', 'image-webpack?bypassOnDebug&optimizationLevel=7&interlaced=false']
             }
         ]
     },
diff --git a/src/Squidex/app/shared/guards/app-must-exist.guard.ts b/src/Squidex/app/shared/guards/app-must-exist.guard.ts
index 4967c16b8..31dd1b9b7 100644
--- a/src/Squidex/app/shared/guards/app-must-exist.guard.ts
+++ b/src/Squidex/app/shared/guards/app-must-exist.guard.ts
@@ -8,8 +8,6 @@
 import * as Ng2 from '@angular/core';
 import * as Ng2Router from '@angular/router';
 
-import { Observable } from 'rxjs';
-
 import { AppsStoreService } from './../services/apps-store.service';
 
 @Ng2.Injectable()
@@ -20,17 +18,19 @@ export class AppMustExistGuard implements Ng2Router.CanActivate {
     ) {
     }
 
-    public canActivate(route: Ng2Router.ActivatedRouteSnapshot, state: Ng2Router.RouterStateSnapshot): Observable<boolean> {
+    public canActivate(route: Ng2Router.ActivatedRouteSnapshot, state: Ng2Router.RouterStateSnapshot): Promise<boolean> {
         const appName = route.params['appName'];
 
         const result =
             this.appsStore.selectApp(appName)
-                .take(1)
-                .map(app => app !== null)
-                .do(hasApp => {
+                .then(hasApp => {
                     if (!hasApp) {
                         this.router.navigate(['/404']);
                     }
+
+                    return hasApp;
+                }).catch(() => {
+                    this.router.navigate(['/404']);
                 });
 
         return result;
diff --git a/src/Squidex/app/shared/services/apps-store.service.ts b/src/Squidex/app/shared/services/apps-store.service.ts
index bcee3880f..899ab6d51 100644
--- a/src/Squidex/app/shared/services/apps-store.service.ts
+++ b/src/Squidex/app/shared/services/apps-store.service.ts
@@ -82,10 +82,10 @@ export class AppsStoreService {
         });
     }
 
-    public selectApp(name: string | null): Observable<AppDto | null> {
+    public selectApp(name: string | null): Promise<boolean> {
         this.appName$.next(name);
 
-        return this.selectedApp;
+        return this.selectedApp.take(1).map(app => app !== null).toPromise();
     }
 
     public createApp(appToCreate: AppCreateDto): Observable<AppDto> {
diff --git a/src/Squidex/app/shared/services/auth.service.ts b/src/Squidex/app/shared/services/auth.service.ts
index e5615d0d6..570c3cdd9 100644
--- a/src/Squidex/app/shared/services/auth.service.ts
+++ b/src/Squidex/app/shared/services/auth.service.ts
@@ -38,6 +38,8 @@ export class Profile {
 export class AuthService {
     private readonly userManager: UserManager;
     private readonly isAuthenticatedChanged$ = new Subject<boolean>();
+    private loginCompleted = false;
+    private loginCache: Promise<boolean> | null = null;
     private currentUser: Profile | null = null;
 
     private readonly isAuthenticatedChangedPublished$ =
@@ -87,16 +89,18 @@ export class AuthService {
     }
 
     public checkLogin(): Promise<boolean> {
-        if (this.currentUser) {
-            return Promise.resolve(true);
+        if (this.loginCompleted) {
+            return Promise.resolve(this.currentUser !== null);
+        } else if (this.loginCache) {
+          return this.loginCache;
         } else {
-            const promise =
+            this.loginCache =
                 this.checkState(this.userManager.signinSilent())
                     .then(result => {
                         return result || this.checkState(this.userManager.signinSilent());
                     });
 
-            return promise;
+            return this.loginCache;
         }
     }
 
@@ -143,11 +147,18 @@ export class AuthService {
         const resultPromise =
             promise
                 .then(user => {
-                    if (user) {
-                        this.onAuthenticated(user);
-                    }
+                    this.loginCache = null;
+                    this.loginCompleted = null;
+
+                    this.onAuthenticated(user);
+
                     return !!this.currentUser;
                 }).catch((err) => {
+                    this.loginCache = null;
+                    this.loginCompleted = null;
+
+                    this.onAuthenticated(null);
+
                     return false;
                 });
 
diff --git a/src/Squidex/project.json b/src/Squidex/project.json
index ff3dbc065..a9c530209 100644
--- a/src/Squidex/project.json
+++ b/src/Squidex/project.json
@@ -15,7 +15,6 @@
       "version": "1.0.0-preview2-final",
       "type": "build"
     },
-    "Microsoft.AspNetCore.ResponseCompression": "1.0.0-preview1-final",
     "Microsoft.AspNetCore.Server.IISIntegration": "1.0.0",
     "Microsoft.AspNetCore.Server.Kestrel": "1.0.1",
     "Microsoft.AspNetCore.StaticFiles": "1.0.0",