Hello,
I want to give an update of the situation because I migrated from Debian
11 to 12 (old-stable to stable). Stable now has ownCloud client 2.11.0.
The described bug is still in this version.
As upstream reported (https://github.com/owncloud/client/issues/10071)
it might be fixed in 2.11.1.
I am just a user and don't know much about Debian Maintenance. From my
perspective it is not "normal" bug. It is a problem that significantly
restricts usability and functionality.
If it is not possible to fix this in current stable because of policies
it would help much if there would be an stable-backports package with
2.11.1 or later. I am aware that this is not an easy thing. I just want
to mention.
Thanks in advance,
Christian Buhtz