bug#53636: 29.0.50; face-remapping broken on master

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: 53636@debbugs.gnu.org,  tsdh@gnu.org
> Date: Wed, 09 Feb 2022 09:01:27 +0100
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > So: in the scenario you've shown, do we want *scratch* to have its
> > mode-line remapped on the new frame, or don't we?  IOW, I agree that
> > the result ideally shouldn't depend on the buffer where make-frame is
> > called, but I need to know what is the desired behavior in order to
> > find code which produces the undesired results.
> 
> Yes, I don't think that the results in the new frame should depend on
> the current buffer when `make-frame' is called.

OK, I think I know where this happens.  Let me dig a bit.