The Command+C+C shortcut works a bit too quickly, so if I'm just a hair slow (even when I'm consciously trying to be quick) it'll just copy a new entry. This happens maybe a third of the time for me, even when I'm using it multiple times in a row.
When that happens I can use the Snippet viewer to reselect my previous entry and try again, but this is inconvenient.
A screenshot wouldn't help, but I'd be happy to record some audio of me gathering clipboard snippets if that would.
I'm using 2.8.3 (435), but this doesn't seem to be specific to pre-release versions.