Sorry, I forgot. A new log file after clean and repair is attached. However the issue remains.
I probably identify when it happens. I´m using tracks for "saving" of my progress in a long missions. When I want to continue with my mission, I open the track file, press F10 and accelerate the time to the point where I want to continue. In this case the strange behaviour occurs. Besides contrails I can see some graphical glitch behind some ships too.
I understand it is issue for only a few people so I don´t expect any fix or solution.
Thank you for your interest Flappie. I appreciate it. You should ask ED for some salary