Yup, annoying as hell. I wonder if this is a hack or a bug.

Never happened to me and this is not really something you call "Autorotation", but it would be cool to have realistic autorotation :D

Just make it so that the longer you press the button the farther it throws the grenade. The button for throwing itself is ok.

Been playing since OFP and this is going in the right direction. It doesn't feel anymore like you would be going on rails.