Thanks for sending me the video – the problem appears to be specific to RAW+JPEG pairs, which your video pointed out to me.
This is what I have determined. The following does not work:
Edit an R+J image
Paste onto another R+J image (by right-clicking on it)
This works for me:
Edit an R+J Image
Click on another R+J image so you enter Edit
Here is a link to a video showing the two approaches: https://www.dropbox.com/t/deoT6dOoIuEebJsE
I’ll work on a fix for the next release. Sorry about the bug.