ok I got some off the top of my head.
1) On Siege of Tobruk, in the Allied main, it is possible to glitch into the top of the lookout towers. If you do it right you can lay down inside the wall and fire outwards. replicate by crouching backwards into the wall until you get tired of being stuck and suicide.
2) The Storch german recce plane is entirely incapable of steering on the ground, once it is remotely airborne it regains its full mobility.
3) The Fiat L6/40 tank does not reload after firing off the initial 12 rounds, it does reload the mg but not the main armament.