Today I wanted to correct all my HDR fields. In the past it was a single value, but currently it is a list where you can select more than 1 value.
So I selected all my Dolby Vision entries. Choose Edit. Select the HDR field I want to extend. Set it to Add mode. Select HDR10 because I want to add HDR10 to all Dolby Vision entries. Result: Dolby Vision and HDR10+ values are deleted at every movie that had Dolby Vision. Example where I selected 3 movies with Dolby Vision but no HDR10:
So the ‘Add’ option did not add a selection, it replaced my values.
Luckily I had a custom field for the HDR information. So I could easily fix the data again.
I expected the value to be added, I expected this behavior when changing Add to Replace.