Media Playback Widget is jumping on return to Homescreen

When a media is playing in the background (e.g. stream in Firefox) and I return back to home, the widget is jumping from mid of the screen. Its best to see the video I attached.

The behaviour is not consistantly showing. I think it happens more often if the widget is loaded the first time. As you see in the video I am reloading the page and then go back home. The widget was closed before that action.