@pascal06 you don’t have to try a beta version anymore (; Cryptomator 1.4.0 was released last month.
Thank you for your contribution and help.
In fact I decided to stop using Cryptomator as I was not able to find out how to solve the issue. Yes luckily I had a backup so no file have been lost.
A few days ago the first freezes, I also updated my Windows so I had the same reaction and thought update could have caused the buggy system. But as I was the only one reporting the problem, I came into conclusion ptoblem was elsewere.
Thank you again and best regards.