I noticed that FS was pausing every 10-30 sec even on the home screen or in the options and the whole sim didn’t respond any more. The pauses where also about 20-30 sec. Not always the same length. Could not see any system and plausible reason.
After long searching I found a thread here in the forum about G-Hub and problems of that sort with wireless USB peripherals.
This was the solution: I removed G-Hub and used a wired mouse and the problem was gone. At least in the updating process (I am reinstalling right now, cause my last hope was “repairing” the sim via settings, which caused a deinstallaion BTW!)