bug#51372: 27.2; Mouse face not cleared in some cases

[Po Lu via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>]

Eli Zaretskii <eliz@gnu.org> writes:

> I don't understand what situation needs to be created to see the
> problem.  The screenshot shows just a handful of characters, and a
> single incomplete screen line, so I cannot figure out what follows it
> nor what kind of "hyperlink" is that.  I also don't understand what
> should have caused the mouse face to be cleared (but didn't, according
> to your report).

I meant to say that part of the mouse face background would remain, even
after the cursor was moved out of one of the links in Info.

But this could be a machine specific problem, because today I couldn't
reproduce the issue on another machine running the same software.

Thanks.