Hi Robbie,
let me share some additional information on this issue before filing a bug.
I checked the log files for errors but didn't detect anything.
Then I verified if any service was failing, but everything was running.
After this I tried to restart ipa.service and this failed with an error message that
pointed to /var/log. I must admit that I cannot recall the error message in detail, but it
was saying something like "cannot write...".
Further investigation showed that file /var/log/dirsrv/slapd-BISZUMBITTERENEN-DE/errors
was very large.
After ensuring that related service is not running I compressed this file and restarted
the service.
After this I could start ipa.service and everything is working again.
THX