The closed door just seems to be a challenge. Solly banging her head could get annoying after a while. I know the rattle rattle rattle does.
My bathroom has a pocket door so has a tendancy to rattle when my cat puts her paw under the door trying to get it open. It took me forever to figure out why half the time my closet door was open when I KNEW I closed it. Finally caught a cat doing the under door thing til she got it open.
We had to put hook and latch on a couple of the interior doors.
The ones she couldn't get to open eventually by banging, she learned to hook her toes on and pull outward.
Need baby locks on everything.