Quote:I use save layers but it doesn't work now. I click save the Exif data and so on - on as you did in your picture but it doesn't work
I just installed a Gimp 2.10.16 in a Windows 10 (VM) and works here as before. A text layer loses text properties but that is expected. Looks like this. https://i.imgur.com/BpgWOuX.jpg
Difficult to give advice when the problem is not obvious. Might be something with the original tiff (or might not). Try a new clean Gimp user profile in case of old settings problems.
Rename C:\Users\"yourname"\AppData\Roaming\GIMP\2.10 to ....GIMP\2.10-old Start up Gimp to create a new default profile.