Photos will overlay a deleted image on the next or previous image.
as per closed thread
Photos will overlay a deleted image on th… - Apple Community
I also have the exact same issue.
I tried to get it resolved with mac support on the phone.
They suggested it is very odd and the library must be corrupt.
I needed to export the photos, create a new library and re-import.
I have 25000 photos. I wasn't excited.
I did however do this and I still have the same problem on the new library.
The old library had HEIC photos, and I exported JPGs to see if that might have been a contributing factor.
Apple - there is a bug in photos. Happens when reviewing photos to delete ones you don't want. Specifically when there are portrait photos mixed in with landscape. The portrait photos cause a glitch, with an overlay and also displays an old image you just deleted as you continue to navigate with arrow keys.
This makes managing the library frustrating as the only way to reset the issue is to esc to the tile view and then double click a photo to go back to full view mode and continue editing.
The thread I linked illustrates the issue perfectly.
Can someone please assist with recreating and debugging this.
It's ruining what is otherwise a good photo editior.
Thanks
-Conor
MacBook Air 13″, macOS 12.6