Update:
After reinstallation and without changing any settings I got the following results:
2020.11-1 Same freezes
2020.10-1 Same freezes
2020.6-1 No freezes
So, keeping 2020.6-1 and with my old settings there are still no freezes. Disabled updates.
Thanks to everyone that helped out and especially to you amazing guys who make these devices! <3