So, this won't be fixed until https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/6565 is resolved? Or is it fixed in newer Ubuntu releases? (On 22.04 I am experiencing the problem quite often, wondering if there is any point in upgrading. In the last 24h I encountered it three times with Thunderbird, each time I could not start it for about ~20 minutes)

mar 05 22:11:42 pc thunderbird_thunderbird.desktop[1018965]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1018965.scope is not a snap cgroup
mar 05 22:12:13 pc thunderbird_thunderbird.desktop[1018995]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1018995.scope is not a snap cgroup
mar 05 22:12:32 pc thunderbird_thunderbird.desktop[1019063]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1019063.scope is not a snap cgroup
mar 05 22:13:36 pc thunderbird_thunderbird.desktop[1019106]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1019106.scope is not a snap cgroup
mar 05 22:15:39 pc thunderbird_thunderbird.desktop[1019468]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1019468.scope is not a snap cgroup
mar 05 22:17:04 pc thunderbird_thunderbird.desktop[1019559]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1019559.scope is not a snap cgroup
mar 05 22:19:04 pc thunderbird_thunderbird.desktop[1019660]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1019660.scope is not a snap cgroup
mar 05 23:24:55 pc thunderbird_thunderbird.desktop[1027932]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1027932.scope is not a snap cgroup
mar 05 23:29:02 pc thunderbird_thunderbird.desktop[1029016]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1029016.scope is not a snap cgroup
mar 06 00:00:09 pc thunderbird_thunderbird.desktop[1041966]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1041966.scope is not a snap cgroup
mar 06 00:00:33 pc thunderbird_thunderbird.desktop[1042002]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1042002.scope is not a snap cgroup
mar 06 00:01:06 pc thunderbird_thunderbird.desktop[1042035]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1042035.scope is not a snap cgroup
mar 06 00:01:22 pc thunderbird_thunderbird.desktop[1042063]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1042063.scope is not a snap cgroup
mar 06 00:01:52 pc thunderbird_thunderbird.desktop[1042091]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1042091.scope is not a snap cgroup
mar 06 00:03:16 pc thunderbird_thunderbird.desktop[1042381]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1042381.scope is not a snap cgroup
mar 06 00:04:17 pc thunderbird_thunderbird.desktop[1042418]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1042418.scope is not a snap cgroup
mar 06 00:05:55 pc thunderbird_thunderbird.desktop[1042583]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1042583.scope is not a snap cgroup
mar 06 00:06:47 pc thunderbird_thunderbird.desktop[1042632]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1042632.scope is not a snap cgroup
mar 06 00:07:17 pc thunderbird_thunderbird.desktop[1042661]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1042661.scope is not a snap cgroup
mar 06 00:08:16 pc thunderbird_thunderbird.desktop[1042732]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1042732.scope is not a snap cgroup
mar 06 00:09:05 pc thunderbird_thunderbird.desktop[1042763]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1042763.scope is not a snap cgroup
mar 06 00:11:25 pc thunderbird_thunderbird.desktop[1042996]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1042996.scope is not a snap cgroup
mar 06 00:12:44 pc thunderbird_thunderbird.desktop[1043033]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1043033.scope is not a snap cgroup
mar 06 00:15:38 pc thunderbird_thunderbird.desktop[1043125]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1043125.scope is not a snap cgroup
mar 06 00:17:56 pc thunderbird_thunderbird.desktop[1043169]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1043169.scope is not a snap cgroup
mar 06 00:18:57 pc thunderbird_thunderbird.desktop[1043210]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1043210.scope is not a snap cgroup
mar 06 17:30:31 pc thunderbird_thunderbird.desktop[1050361]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1050361.scope is not a snap cgroup
mar 06 17:30:56 pc thunderbird_thunderbird.desktop[1050615]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1050615.scope is not a snap cgroup
mar 06 17:34:25 pc thunderbird_thunderbird.desktop[1051309]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1051309.scope is not a snap cgroup
mar 06 17:36:37 pc thunderbird_thunderbird.desktop[1051418]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1051418.scope is not a snap cgroup
mar 06 17:36:58 pc thunderbird_thunderbird.desktop[1051482]: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-thunderbird_thunderbird-1051482.scope is not a snap cgroup