Application Dashboard Widget always opens on the same screen

[Jon Hreg <hreg@gmx.net>]

Hi,

since the update to plasma-desktop amd64 4:5.23.0-3, the Applications
dashboard no longer opens on the respective screen, but always on one
and the same screen. (exactly the same misbehavior was observed after
the mentioned update on two different machines running Debian/SID/KDE)

* Debian SID,
* KDE, multi-monitor setup
* for each screen there is a separate panel
* each of these panels has its own applications dashboard widget

Previously, the Applications dashboard was opened on exactly the screen
to which the panel/widget belonged.

Setting the screen via Alt+F3 / Special Window Settings did not work -
probably the identification of the window was insufficient, because
the direct Alt+F3 / "Move to Screen" menu entry worked, but this change
is of course not persistent.

Does anyone have any idea how to fix this?
It's more annoying than you think at first ...
Thanks a lot.