It’s not an incompatibility of Gnome 44.5 and its settings with Qt and Linux 6.5 doesn’t break the compatibility.
Something had gone wrong during automatic processing of the update on 8/30.
Searching a possibility to go back to the flawlessly working system ¹ with Gnome 44.4 and Linux 6.4 (without a snapshot of the old system) looked more and more desperate.
Probably always a bad idea to go back with a rolling release, anyway.
¹) including the, also desperate, resort of a fresh re-install (and months of work to configure it)
So I tested a fresh installation on a separate partition. (and have been agreeably surprised to find the new Uranos .iso-image)
Installed it and found that none of the problems I got with the current Talos appeared.
So the next question arises:
How to upgrade the current Talos to a new Uranos and preserve the configuration of the Ui, the file system and the applications?
I have a separated home directory, parts of which are overwritten automatically during installs and an additional partition, which is (hopefully) never touched by automatic processes, containing additional configuration and the working data.
@ Yochanan:
Should I open a new topic for this question or would I be blamed for opening multiple topics for the same question?