Infinite snow golems spawned

What I thought what would happen:
The game would open up normally as usual, with only 2 golems I have spawned before.

What happened was as soon as I got into the game, the game lagged very much (2fps) then I saw thousands of snow golems appeared

Steps to Reproduce:
1.Log into a game
2. lagged like mad
3. saw thousands of snow golems in the distance

The attachment is the crash report that happened before.