Hi Jochym,
I have had two sessions now with your 0.9 version on my NexStar 6SE Alt/Az with no problems and the tracking seems a little better. I left the scope tracking for over two hours without much deviation.
One thing I have noticed that is a little strange is that on a goto sometimes the scope sets off in one direction and then after about 90 degrees in Azimuth reverses direction going back past the origin to the target. It is not a big deal just a little disconcerting when the scope sets off in the wrong direction initially.
This doesn’t appear to be related to the cable wrap position.