The controls changed so I couldn't do certian things like grab a single item.

The bug wasn't really triggered, I didn't trigger it, at least. My sister was playing, and I started playing after her, but the controls were messed up. I have no idea what happened, and I tried resetting the controls, but that didn't work. Anyway, it also messed up the ability to drop blocks, like I have to click the item and hold down the mouse, then let it go to drop(before glitch/bug). Now I have to click the item then click again to drop it. It's odd.