So, I checked by setting :authentication_check_interval: 1.minute in advanced settings and setting the credentials to become invalid by adding ec2.eu-central-1.amazonaws.com to /etc/hosts to point to localhost. The managers auth would become invalid, the refresher would stop to work. After correcting the hosts settings the schedule worker did an auth check and the refresh worker would start automatically again.

So my Comment 6 https://bugzilla.redhat.com/show_bug.cgi?id=1374865#c6 is invalid.

Changing the the issue to reflect the UI part only