diff --git a/ui-ngx/src/app/core/api/entity-data-subscription.ts b/ui-ngx/src/app/core/api/entity-data-subscription.ts
index 25cb47ca0a..1e0f31c4d0 100644
--- a/ui-ngx/src/app/core/api/entity-data-subscription.ts
+++ b/ui-ngx/src/app/core/api/entity-data-subscription.ts
@@ -42,6 +42,7 @@ import {
   EntityCountCmd,
   EntityDataCmd,
   IndexedSubscriptionData,
+  NOT_SUPPORTED,
   SubscriptionData,
   TelemetrySubscriber
 } from '@shared/models/telemetry/telemetry.models';
@@ -786,7 +787,7 @@ export class EntityDataSubscription {
   private reportNotSupported(keys: AggKey[], isUpdate: boolean) {
     const indexedData: IndexedSubscriptionData = [];
     for (const key of keys) {
-      indexedData[key.id] = [[0, 'Not supported!']];
+      indexedData[key.id] = [[0, NOT_SUPPORTED]];
     }
     for (let dataIndex = 0; dataIndex < this.pageData.data.length; dataIndex++) {
       this.onIndexedData(indexedData, dataIndex, true,
diff --git a/ui-ngx/src/app/core/api/widget-subscription.ts b/ui-ngx/src/app/core/api/widget-subscription.ts
index f9a79d8f76..374775bdd0 100644
--- a/ui-ngx/src/app/core/api/widget-subscription.ts
+++ b/ui-ngx/src/app/core/api/widget-subscription.ts
@@ -81,6 +81,7 @@ import { distinct, filter, map, switchMap, takeUntil } from 'rxjs/operators';
 import { AlarmDataListener } from '@core/api/alarm-data.service';
 import { RpcStatus } from '@shared/models/rpc.models';
 import { EventEmitter } from '@angular/core';
+import { NOT_SUPPORTED } from '@shared/models/telemetry/telemetry.models';
 
 const moment = moment_;
 
@@ -1541,7 +1542,7 @@ export class WidgetSubscription implements IWidgetSubscription {
       } else if (prevData && prevData[0] && prevData[0].length > 1 && data.data.length > 0) {
         const prevTs = prevData[0][0];
         const prevValue = prevData[0][1];
-        if (prevTs === data.data[0][0] && prevValue === data.data[0][1]) {
+        if (prevTs === data.data[0][0] && prevValue === data.data[0][1] && data.data[0][1] !== NOT_SUPPORTED) {
           update = false;
         }
       }
diff --git a/ui-ngx/src/app/shared/models/telemetry/telemetry.models.ts b/ui-ngx/src/app/shared/models/telemetry/telemetry.models.ts
index d93dde4530..66f39d080a 100644
--- a/ui-ngx/src/app/shared/models/telemetry/telemetry.models.ts
+++ b/ui-ngx/src/app/shared/models/telemetry/telemetry.models.ts
@@ -37,6 +37,8 @@ import { isUndefined } from '@core/utils';
 import { CmdWrapper, WsSubscriber } from '@shared/models/websocket/websocket.models';
 import { TelemetryWebsocketService } from '@core/ws/telemetry-websocket.service';
 
+export const NOT_SUPPORTED = 'Not supported!';
+
 export enum DataKeyType {
   timeseries = 'timeseries',
   attribute = 'attribute',