I have all of sudden got an problem with this.
When I scroll on my timeline (not play) the warning comes up "please release caps lock etc" but my caps lock is not on.
I'm on New iMac everything works fine .. This came from knowhwere .. not updated anything
AE cc2018 15.0.0
Ignore me .. Just restarted and its sorted
This problem was driving me absolutely nuts, as my caps lock was NOT activated. I finally figured out that, somehow, the wireless keyboard, which came with the computer and I never use, was accidentally turned on, while shuffling around in my desk drawer. I turned it off and now everything works fine.
I got the idea to check from this thread: Refresh Disabled (release Caps Lock to refresh view) ERROR : Adobe After Effects
Maybe that will help others with this problem.
Such a stupid and weird thing, man.