I use column mode a lot with the simple shift-Alt key combination.
But since v8.6 I'm getting stuck in column mode (or multi-edit or whatever this new feature is called) and can't get out.
I can't find any preference to re-enable the pre-8.6 behavior and can't find a key combination to cancel column mode.
All I can do now is change my selection into 1 line and only then does column mode seem to cancel itself. It seems very unintuitive.