Just curious, were there any new changes made to branch creation and protected branches? I'm getting a
Branch creation was rejected by Git hook
When trying to create branches via my gitlab instance and it seems to take a lot longer to process the request. Pushing via a command shell seems to work well.
--update
I just rolled back my version to the older version and see that all of the branch functionality via the gitlab site works okay.
I'm not aware of any changes that would explain that error, but that doesn't mean it can't be a regression in 8.5. If so please open an issue for it and link from https://gitlab.com/gitlab-org/gitlab-ce/issues/13350