X-Debbugs-CC: poming...@gmail.com
This appears to be known problem:
https://forum.audacityteam.org/viewtopic.php?f=48&t=110214
You could still investigate further by testing if similar behaviour
manifests in other wxwidgets applications. Running
aptitude search '~Guitoolkit::wxwidgets'
will give you a list.
I suspect that the issue is due to GL rendering problems. You could
try changing some environment variables. A list of available ones is
here: https://docs.mesa3d.org/envvars.html
LIBGL_ALWAYS_SOFTWARE=true would be the first thing I'd try.
Beyond that I doubt there is much anyone could do. Since you report
that it works with the newest release compiled from source, I would
recommend to just hope and wait for a backport/proposed update.
Regards,
Dennis.
