Dragging Clips doesn't reliably show previews

[mariusf59209747]

I'm on Mac, Big Sur 11.2.3 running Premiere 15.1.0 (Build 48)

When moving clips in the timeline by drag and drop, the preview "ghosts" don't show.

I can sometimes force them to show by changing the zoom level, but that doesn't work reliably either.

I've tried cleaning out the cache and resetting the workspace to a saved layout as suggested elsewhere – but no joy. Does anybody else experience this? Is there a fix? It gets pretty frustrating pretty fast…

[Niklas5FD5]

Having the exact same problem any many (Perfomance issues, RAM workload, etc.) more since today.
Already tried reinstalling and other different things but nothing works.