Fix tests, again

Signed-off-by: Robin Townsend <[email protected]>

Author: robintown

src/stores/VoiceChannelStore.ts

@@ -198,14 +198,15 @@ export default class VoiceChannelStore extends EventEmitter {
         this.activeChannel.off(`action:${ElementWidgetActions.MuteVideo}`, this.onMuteVideo);
         this.activeChannel.off(`action:${ElementWidgetActions.UnmuteVideo}`, this.onUnmuteVideo);
 
-        this.activeChannel = null;
         this._roomId = null;
         this._participants = null;
         this._audioMuted = null;
         this._videoMuted = null;
 
         this.emit(VoiceChannelEvent.Disconnect);
         this.ack(ev);
+        // Save this for last, since ack needs activeChannel to exist
+        this.activeChannel = null;
     };
 
     private onParticipants = (ev: CustomEvent<IWidgetApiRequest>) => {