[BUG] Citizens freezing

I had reported it as a reply in another issue, but I decided to create a separate issue.

Citizens v 2.0.31-SNAPSHOT (build 2996, tried more recent builds but it wasn't fixed) ModelEngine R3.1.5

some models of NPCs just freeze, I don't know why, they seem to be some specific ones because only few work correctly

these npcs should be walking: https://youtu.be/p-GLOttMbFY

All npcs worked before and recently stopped working, probably after some ModelEngine update. After creating a new NPC with modelengine, works normally, after a server restart it just frozes