URGENT completely crippling regression

[Teo Tei]

Hello,

Please see this bug report, this makes many basic applications in Ubuntu
completely unusable:

https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1831280

I haven't restarted my computer yet, I don't know if the issue would
disappear after a reboot, and reappear only sporadically, or not.

Either way, it needs very urgent attention.

It must have been introduced by some recent update (again, unless it's
something that happens randomly and sporadically and by mere chance I'm hit
now for the first time).