bug#44517: 28.0.50; Can't unselect minibuffer window

[Eli Zaretskii]

> From: Michael Heerdegen <michael_heerdegen@web.de>
> Cc: acm@muc.de,  44517@debbugs.gnu.org
> Date: Sun, 08 Nov 2020 18:25:11 +0100
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > This probably means that the delay is not due to a timer, but to a
> > call to sit-for or somesuch.  For example, if you type C-x, the echo
> > appears after a delay that doesn't have to do anything with timers.
> 
> Sounds reasonable, yes.
> 
> I didn't find out anything on the Lisp level.  `post-command-hook'
> doesn't seem to be involved.  I traced some potentially related
> functions, like `sit-for' and `select-window' but they were not called
> when the issue happened.

There's sit_for in dispnew.c.