Hi philosophy-chemical,

Please have a look here:
https://discussions.apple.com/thread/255762577?sortBy=rank&page=1
Add your vote please.

In my private opinion, it seems like something Apple needs to address. Yes, there could be a workaround, but that might be eliminated when Apple fixes it. Meaning, all previews set up with an app based solution might miss the images then. This puts every non-Apple developer in a difficult position.

Yes, having no solution after so many months is annoying; I agree.

My best wishes.