Anvil gets stuck in continuous falling loop instead of dropping normally near zombie in minecart

Short description of the issue

An anvil behaves like a falling block but gets stuck in a continuous falling/reset loop instead of dropping and settling normally when a zombie in a minecart is nearby.

Steps to reproduce the issue

Place an anvil in a tight or confined area

Put a zombie inside a minecart

Position the minecart very close to the anvil

Let the setup update (movement or interaction nearby)

Observe the anvil behavior

Expected result

The anvil should fall due to gravity and land normally, then remain stable.

Actual result

The anvil fails to complete its fall and becomes stuck in a continuous falling/reset loop, appearing locked and unstable.