Owncloud v 8.2.2
In under specific case, we can not change the group filter synchronization.
Go to the tab Groups.
Change group class
Select some groups
Click on "Modify query" in order to set it manually
Click again on "Modify query" to return to assisted configuration.
The group class is enabled but not the groups filter list.
But, we can close the window and return on it.
Can confirm, same happens on users page.
That was tough to debug, because race condition. Made my brain turn 🙈
But, the fix is in #22358
Would be great if you could test @ejouvin
Fix race condition when switching filter mode. Fixes #22278