Since the update to version 2.2 revisions are not saved for users that are excluded from viewing the field via the "Display based on permissions" setting in the wigdet.
When I downgrade to 2.1 it works fine again.
Same problem is reported here for the Simplify module:
https://www.drupal.org/project/simplify/issues/3081745
🐛
Revisions not saved when Revision info is hidden
Active
Check "Display based on permissions" option in the wigdet with only admins having the permission for „node: change revision protocol“
Make a change in a node with a non admin user account where the field is not displayed
-> No revision is saved
Closed: duplicate
2.2
Code
Not all content is available!
It's likely this issue predates Contrib.social: some issue and comment data are missing.