If you go to Settings → Settings Editor → Notebook → Windowing mode → none, does it stop? Can you share a notebook in which this is happening and the browser name and version?
This already seems to improve the situation A LOT. Many thanks. Is there an issue pertaining to this, that I could reference? Either way I have asked if we can change the default setting for Windowing mode on the pangeo-docker-images, or is there a reason not to do that?
Ill keep investigating the other issues. Again HUGE thanks for this fix!