Yesterday night, I couldn't do Polar Alignment at all...
I parked/unparked/homed the mount several times but Ekos wasn't happy for some reason and refused to proceed saying something like "mount needs to be unparked first".
It wasn't a big problem since my PA should be good anyway - I just wanted to check it.
So I went ahead with my sequence.
I stopped it in about three hours because of clouds.
After that I was able to perform PA without any problem.
So, yes. There's something weird going on with AM5's homing/parking....