bug#69534: Scrolling up causes all text to shift drastically when cursor hits bottom of viewable area.

[Eli Zaretskii <eliz@gnu.org>]

> Date: Thu, 07 Mar 2024 02:13:22 +0000
> From: Arkdae <arkdae@lnx.graphics>
> Cc: 69534@debbugs.gnu.org
> 
> What I am trying to say is, when the point gets to the bottom of a
> window, and you move the scroll bar up the smallest amount you can,
> then the point and the text all move to the middle. Then you move the
> scroll bar up one more tiny amount and the text shifts back down to
> where it should have been for normal line scrolling.
> 
> But, really if you don't see it, you don't have the problem. It's
> reasonably obvious. It is a good point that you made, and so I tried a
> different GTK theme. I believe the default is Adwaita, so I started
> Emacs like so:
> 
> GTK_THEME=Adiaita emacs -Q
> 
> But it still occurs, but maybe not quite as often.
> 
> Otherwise, I can't say that I am aware of any customization to Emacs.
> I'm rather new to using it. The only extensions I use are slime and
> ace-window.

Strange.  Can anyone else reproduce this weird display issue?