World freezes when multiple villagers are spawned in a specific world

hi, i was building my bunker map, but when i spawned some villagers the world "broke" in fact the chunks were not loading anymore, the mobs were still, and i noticed that i couldn't interact with the chests, as if everything was blocked. Normally the world should work and, for example the chunks should generate.

Steps to Reproduce:

1. Download and import world.mcworld
2. Spawn multiple villagers

Observed Results:
The world freezes.

Expected Results:
The world shouldn't freeze.