Lars Ingebrigtsen wrote:

> Mike Kupfer <mkupfer@alum.berkeley.edu> writes:
> 
> > Try
> >
> >   emacs -Q
> >   M-x shell
> >   $ ksh
> >   C-x 2
> >
> > On my Debian desktop (running Buster), that's enough to provoke
> > misbehavior, without even resizing.
> 
> I'm also using Debian/bullseye, and it doesn't misbehave for me:

Hmm.  I replaced emacs-lucid with emacs-gtk on my bullseye system, and
I'm still seeing it.