*** This bug is a duplicate of bug 2059847 ***
https://bugs.launchpad.net/bugs/2059847
Yes this was a regression that occurred in
https://launchpad.net/ubuntu/+source/mutter/42.9-0ubuntu7.1 relative to
the PPA which contained the fix. But it's still bug 2059847 that's
unresolved in 22.04.
**
Here's a movie showing the behavior on my program when clicking on an
FLTK tree and the slowdown on emacs when typing on a long emacs C++
file. The problem is not on FLTK or Emacs as the code was working fine
before (and Wayland or XWayland has no issues):
https://mega.nz/file/qPoV2S5A#qdytFYmZth
