Fix participants and local media stream

public/browser-matrix.js

@@ -15899,6 +15899,8 @@ class MatrixClient extends events_1.EventEmitter {
             for (const track of this.localAVStream.getTracks()) {
                 track.stop();
             }
+            this.localAVStreamType = null;
+            this.localAVStream = null;
         }
     }
     /**