Ah okay, so does the page in the new window display correctly or not?
Here it does not, and after the `print` then it gets displayed...

On Sat, 16 Apr 2022 at 21:18, Eli Zaretskii <eliz@gnu.org> wrote:

> > From: dalanicolai <dalanicolai@gmail.com>
> > Date: Sat, 16 Apr 2022 21:16:18 +0200
> > Cc: Emacs Devel <emacs-devel@gnu.org>
> >
> >  I guess I don't understand what you mean by "window does not get
> >  redisplayed".  because I see no difference on display before and after
> >  I do 'M-: (print "test")'.  Maybe I didn't follow the recipe to the
> >  letter?
> >
> > Did you scroll forward a few pages before splitting the window?
>
> Yes.
>