Good morning @be_Berlin,
It seems it is the same with decimals. So 2 is okay as a number but 2.5 or 2,5 don’t work?
Have you tried setting the decimal places in your number field? This came up recently in another topic, you should find that “2.5” will be stored in your database table, but unfortunately, we have an issue with storing commas. We have an open issue for this, hopefully, we’ll get it resolved soon.
I hope this helps!
Cheers,
Peter Evans