@Wolfgang It isn’t but it replicates what programs do when they pass an image to PhotoLab.
I believe that the issue is related to ‘External Selections’ as I discussed here Delete VC in PL8 for pictures opened with another image browser - #4 by BHAYT at some length, hopefully correctly!?
PS:- It is all based around the designation of an external selection so if the field is changed then it becomes a candidate for the same adjustments as a ‘Project’ including ‘Remove’