bug#50424: 27.2; Tab bar button mouse face not clearing entirely

[Eli Zaretskii]

> From: Po Lu <luangruo@yahoo.com>
> Cc: 50424@debbugs.gnu.org
> Date: Mon, 06 Sep 2021 20:30:47 +0800
> 
> It does seem to be window-system dependent.  In fact, the relief
> actually renders differently on MS-Windows as compared to how it renders
> on X.
> 
> I have attached two images detailing the difference, and additionally,
> an image of the bug on X.

Thanks, but which one is which, and which one(s) show the bug?