bug#34179: 27.0.50; message hangs when buffer with process visible

[martin rudalics]

> It seems to be something in window-configuration-change-hook.  When I
> clear that hook, the problem goes away.  I'll try to find out what it
> is.

Is it 'window--adjust-process-windows'?  Have you customized
'window-adjust-process-window-size-function'?

martin