Other profiles images flicker over mine

This Does Not happen when I'm alone in a meeting.

When in a meeting with at least one other, their image ... video...(whatever you would see in their 'Brady Bunch' box) flickers onto my square... over my video.  

When my cam is off, it's stable.

I can use my cam in Skype and Google Chat, with no issue. 

I logged in to a secondary account, on Zoom, and it still did it.