Asked in Care of Rabbits
Your lop ear has suddenly been dragging his liter box and kicking out all the liter Why?
Your rabbit is just playing. It can be extremely annoying, but this is simply normal rabbit behavior.
You can try to divert this to something more desirable. Give the bunny a place where the chew, dig and throw things with impunity, give them other toys to play with... distraction is the key here.