Yeah. This is bad. It's basically unusable after update to 86.0.4240.75-1 . Here's what mine looks like. Note that there are only two Chrome windows open-- the one in the bottom right is a visual artifact, as is the portion of my desktop surrounding it-- those are actually being displayed as the contents of the second Chrome windows, which you can see the border of in the middle. Unfortunately, I don't have time to wait for an update. I need it to work today, so I can fix other people's issues. Lovely.
Only way I know to triage until they fix it in a future update is to uninstall and install an older version.
I need it to work now, like right now, so downloaded closest stable version I could find, closed Chrome and uninstalled buggy version using Synaptic; closed Synaptic, and installed older version (84.xxx).
This worked to squash the bug, at risk of recently known security exploits. Yay! Hopefully they'll have a patch soon.
Oh, yeah-- this is where I got the old version:
Specifically, this one:
And this is where I found the reference to SlimJim: