FP3+ Camera: strange filenames

I use a NextCloud service to sync my photos. NextCloud produces errors every fourth photo or so and cannot upload. It took me a while to figure out why: FP3+ creates image file names that usually look like this:
So far so good. However, once in a while the file name is like this:
i.e. with a backslash after the final six-digit number. Strange! And this obviously causes problems with sending such a file via HTML or so.
Anyone else seeing these awkward file names? Any hint for a solution to this?
Thx, Michael

A post was merged into an existing topic: FP3 Camera File Names including “”?