diff --git a/openvidu-browser/src/OpenVidu/Session.ts b/openvidu-browser/src/OpenVidu/Session.ts
index 6bc5a075..14906d24 100644
--- a/openvidu-browser/src/OpenVidu/Session.ts
+++ b/openvidu-browser/src/OpenVidu/Session.ts
@@ -71,6 +71,7 @@ const platform: PlatformUtils = PlatformUtils.getInstance();
  * - signal ([[SignalEvent]])
  * - recordingStarted ([[RecordingEvent]])
  * - recordingStopped ([[RecordingEvent]])
+ * - networkQualityLevelChanged ([[NetworkQualityLevelChangedEvent]])
  * - reconnecting
  * - reconnected
  *
@@ -935,9 +936,13 @@ export class Session extends EventDispatcher {
         if (msg.connectionId === this.connection.connectionId) {
             this.ee.emitEvent('networkQualityLevelChanged', [new NetworkQualityLevelChangedEvent(this, msg.qualityLevel, this.connection)]);
         } else {
-            this.getConnection(msg.connectionId, 'Connection not found for connectionId ' + msg.connectionId).then((connection: Connection) => {
-                this.ee.emitEvent('networkQualityLevelChanged', [new NetworkQualityLevelChangedEvent(this, msg.qualityLevel, connection)]);
-            });
+            this.getConnection(msg.connectionId, 'Connection not found for connectionId ' + msg.connectionId)
+                .then((connection: Connection) => {
+                    this.ee.emitEvent('networkQualityLevelChanged', [new NetworkQualityLevelChangedEvent(this, msg.qualityLevel, connection)]);
+                })
+                .catch(openViduError => {
+                    logger.error(openViduError);
+                });
         }
     }
 
@@ -1135,7 +1140,7 @@ export class Session extends EventDispatcher {
     }
 
     sendVideoData(streamManager: StreamManager, intervalSeconds: number = 1) {
-        if(
+        if (
             platform.isChromeBrowser() || platform.isChromeMobileBrowser() || platform.isOperaBrowser() ||
             platform.isOperaMobileBrowser() || platform.isElectron() || (platform.isSafariBrowser() && !platform.isIonicIos()) ||
             platform.isAndroidBrowser() || platform.isSamsungBrowser() || platform.isIonicAndroid() ||
diff --git a/openvidu-browser/src/OpenViduInternal/Events/FilterEvent.ts b/openvidu-browser/src/OpenViduInternal/Events/FilterEvent.ts
index bdb0fa58..ab327f17 100644
--- a/openvidu-browser/src/OpenViduInternal/Events/FilterEvent.ts
+++ b/openvidu-browser/src/OpenViduInternal/Events/FilterEvent.ts
@@ -16,7 +16,6 @@
  */
 
 import { Event } from './Event';
-import { Stream } from '../../OpenVidu/Stream';
 import { Filter } from '../../OpenVidu/Filter';
 
 
diff --git a/openvidu-browser/src/OpenViduInternal/Events/NetworkQualityLevelChangedEvent.ts b/openvidu-browser/src/OpenViduInternal/Events/NetworkQualityLevelChangedEvent.ts
index 0eb423b2..a9eba26b 100644
--- a/openvidu-browser/src/OpenViduInternal/Events/NetworkQualityLevelChangedEvent.ts
+++ b/openvidu-browser/src/OpenViduInternal/Events/NetworkQualityLevelChangedEvent.ts
@@ -20,22 +20,25 @@ import { Session } from '../../OpenVidu/Session';
 import { Connection } from '../../OpenVidu/Connection';
 
 /**
- * Defines event `networkQualityLevelChangedEvent` dispatched by [[Session]].
- * This event is fired when the network quality of the local connection changes
+ * Defines event `networkQualityLevelChanged` dispatched by [[Session]].
+ * This event is fired when the network quality level of a [[Connection]] changes.
  */
 export class NetworkQualityLevelChangedEvent extends Event {
 
+    /**
+     * New value of the network quality level
+     */
+    qualityLevel: number;
 
     /**
-     * New value of the property (after change, current value)
+     * Connection for whom the network quality level changed
      */
-    qualityLevel: Object;
     connection: Connection
 
     /**
      * @hidden
      */
-    constructor(target: Session, qualityLevel: Object, connection: Connection) {
+    constructor(target: Session, qualityLevel: number, connection: Connection) {
         super(false, target, 'networkQualityLevelChanged');
         this.qualityLevel = qualityLevel;
         this.connection = connection;