[itsme]

I'm pretty sure that GoogleDrive sync is a main part of the problem and the issue will be gone as soon as I run MobileSheets without it.
I don't change my user filters very often, so I don't expect that MobileSheets tries to write into user_filters.xml every time it is accessed

Looking into my MobileSheets folder I find this:
   
When I started this thread, I replaced the empty file with a correct one from a backup. I copied that correct file to user_filters_2024-03-14.xml to simplify the workaround of copying and copied the wrong file to user_filters_empty.xml. Note that the time stamp of user_filters_empty.xml matches the time when I started this thread.
user_filters.xml is 403 bytes again, the time stamp is 2024-03-06 8:24, so it happened again yesterday morning.
The <somenumber>user_filters.xml with 0 bytes size make me think that the sync is involved somehow.

GoogleDrive keeps a history of the last 100 versions of a file
   
I downloaded the last saved versions until correct and incorrect changes occurred
   
The local time stamps don't help, they show when I downloaded the files.
But GoogleDrive_FileVersions shows that the last correct change _097 -> _098 happened 2024-03-15, _098 -> _099 on 2024-03-17 saved an empty file
From 2024-03-15 to 2024-03-17 I was away from home, so I am sure that only my Detachable was in use. I cannot tell if on my main laptop, that I left at home (switched off or in standby) MobileSheets had stayed open.
GoogleDrive's activity list shows the time stamps and makes me think that unnecessary file changes took place