I've got logic completely freezing for 1-2 minutes at a time, running CPU at 150% the entire time, audio still plays, doesn't matter how complex the project, it just freezes, and carries on, the UI becomes completely unresponsive, this is steadily driving me insane, projects are taking forever, I'll solo a track on loop to make one EQ change and spend 2 minutes listening to that loop, unable to do anything about it.
EDIT: perfect example, just hit space, realised I was on the wrong part, went to hit space again, maybe 1 second had passed, had to wait 30 seconds for logic to become responsive again, sat listening to just a bass line... great fun...