Hitting the warden with a projectile while trying to pathfind sometimes crashes the game

A bit of a bizarre crash, but it happens when you try to hit the warden with the snowball while the Warden is trying to pathfind.

How to Reproduce

1. Summon a Warden.
2. Create an obstacle for him. (water, lava, basically anything to make pathfinding a bit harder)
3. Hit the warden with a projectile to get it angry.

Observed Result
The game starts to become unresponsive and eventually crash

Expected Result
The game should not crash.