No idea how to describe this so searching found nothing.

When your in water and you leave to go onto land, but you are pressing the hit/attack/dig etc.. button, it continues to do so when on land and you will bash away at nearby structures until you hit again manually a few times to turn it off.

I think its happened since version 1.2 but I thought there would be sufficient community feedback on this I would not mention it. But apparently not.