Ferrante, are you still having issues? Last night with the new scheduler I ran into some strange mechanics and I wasn't able to park at the end of my night. It tried 5 times to run the park command but it failed for some reason. I need to look at the logs when I get home.
I'm still having issues but they are not related to mount parking per se. The mount parks correctly when the scheduler asks to.
The issue is that while parking the driver set the mounts status as 'parked'. So, for example, the roof starts closing before the mount is safe in the parking position...
From which tab you run the park command?
Do you also have a dome/roof? in this case check if there's any 'dome locks' flagged.