Zombies breaking physics.

[rdebath]

mcbkp-test.zip

The attached zip file contains a level with broken physics (set to 3).

There's a Firework just behind you at spawn, if you set it off by hitting it the lava tail will probably leave some blocks behind and the firework explosion will likely not complete the fall and dissipate.

There are also several chains and loops of DoorGreen which will move only a few steps before leaving blocks in the "Door8_Air" state.

This appears to be related to some trapped Zombie blocks, which if removed will return the physics to normal.