Hi Andreas - what operating system are you using? I was having that problem on MacOS and the latest Beta build (3.6.1) no longer exhibits that problem.
Fred
Celestron EdgeHD 11/Moonlite LiteCrawler/iOptron CEM120EC2/ASI6200MM Pro
Radian 61/Radian Focuser/iOptron CEM26EC/ASI6200MC Pro
OAG: ZWO OAG-L/ASI174MM or ASI290MM
ZWO EFW (7x2")
PegasusAstro Ultimate Powerbox V2
Raspberry Pi 4, 8GB/StellarmateOS