I guess i must have resetted the keys, and now i can no longer set defend to left shift. I am sure the left-shift key works as i can assign defend to left-shift+Z for example and ive tested the left shift key elsewhere.
I am used to playing a certain way, and it is frustrating as heck trying to relearn the keys, please fix this bug.
There's an option that says "modifier key" when you customize controls.
Modifier keys work combined with other keys (shift+Z instead of shift alone).
If you want to use shift alone, you'll have to remove it from the modifier keys.