This is an unimportant thread. I didn't add 'bug' since I just don't think 'layouts' can ever be fixed.
Observation #1:
I use a single layout, so I hadn't looked at layouts for a while. Interestingly it dutifully kept all mine going back to 2012! A few last-closed and snapshots. I'm not sure how many there'd be if I used more than 1 layout. Does it ever clear?
Observation #2:
I actually have 2 layouts saved. In theory. The one I always use, and a quick 1-pager for desperate times. Even though the small one was listed as available, I didn't see it in the snapshots. So, I clicked on the small one to see what would happen:
.
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Isn't that fascinating? The layout is remembered but not the ability to display it. I assume they never did put in code to make sure saved layouts didn't get deleted in the snapshot list?