I had a situation I've not encountered before where a MF was started (correctly) at 04:54:15 but did not compete. Guiding and capturing were correctly suspended. There were no log entries for almost 2 hours until 06:40:50 when the scheduler attempted to close things down at twilight. The mount failed to park because the system thought a slew was still in progress.

I've not seen this condition before and I have had a successful MF in 3.5.5.