Shrinking frame when minibuffer is used in Fedora/KDE?

[Tim Landscheidt]

Hi,

I recently upgraded to Fedora 37 and I don't know whether
this issue is related to that or that I'm using (must use)
Emacs 28.2 under KDE for the first time not in maximized
mode, but, after some time, each use of the minibuffer de-
creases the vertical frame height.

For example, when I just now press ESC :, the frame height
decreases by about one text line.  If I cancel the prompt
with C-g, the frame height decreases by about another one
text line.  So after every couple of minibuffer uses, I have
to enlarge the frame again.

Before I debug this further, has anybody else experienced
something similar?  (The behaviour usually does not start
immediately after launching Emacs, so this is not necessari-
ly trivial to reproduce.)

Tim