The most annoying thing in the world as it completely disrupts workflow:
My 60fps footage modified to 24p (maybe that is relevant?) won't scrub in the source panel. It shows a completely different part of the clip. Then when you let go of left click, it returns to the correct position in the footage.
It makes editing impossible. I changed the playback resolution to 1/2 and 1/4 but it makes no difference.
Editing, Performance, User interface or workspaces