Mobs look weird?

[DelightZone]

I mean, I'll try to re-implement them myself, but alright...
They work fine in this module, but I guess something is wrong with this one... sigh.

Sorry for not much more info, I am not really a professional in here.

P.S: IntelliJ IDEA shows no errors, so ig everything works as it should, except the spawn eggs and the mantis.

[Murkrage]

@DelightZone Did you ever figure out what the problem was? I'm running into this problem now with any mob I'm creating. Even a brand new one created with Blockbench.