bug#50462: 27.2; emacsclient syntax highlight failure

[Eli Zaretskii]

> From: RDS <rds1944@gmail.com>
> Date: Wed, 8 Sep 2021 13:05:59 -0700
> Cc: larsi@gnus.org, 50462@debbugs.gnu.org
> 
> >OK, so please describe again, in as much detail as you can, what do
> >you do with Emacs between correct display and incorrect display.  You
> >said you switch to another buffer and return, but could you tell more?
> >Just switching to another buffer and back immediately triggers that?
> >Or something else is needed?
> That is indeed the tough part. I have yet to find a definite repeatable 
> pattern that induces the bug. But, I now
> usually arrive there in a few minutes of activity with two emacsclients -t in 
> use.
> 
> Switching back & forth immediately will not do it. At least one client is 
> loading / unloading various files before
> switching back to other client. Take a look again at the original post for 
> more of these general actions I use.

So two frames from two separate emacsclients are always involved?  And
you need to switch from one client to another and back?