Snapshots missing in action

RT5.4rc2 & RT5.3.

I processed a photo and did 3 snapshots as intermediary steps. How can I go back to these snapshots?



Just click on the snapshot

Snapshots are not saved, so if you close the photo, they’re gone.
I hope RT will save them at some point in the future:

Now ART do it, is it so difficult to implement in RT??