Apologies, I made this ticket without logging in. It's me!
Auto complete is a bit too aggressive
Ctrl +alt + Left/Right is a Windows command to switch the orientation of the display....
Grammarly plugin?
Folding environments like equations does seem to work though. It would also be great...
Shortcut to switch focus to editor from Ctrl+F or Ctrl+R
Replicated this on Windows 8.1. Newer build also has the problem.
VOTE: texstudio