Found a bug with primitive mobs rocket creeper and BOP-biomes o plenty biome grass block
the issue happed when a rocket creeper blew up a BOP grassblock-sandy grass as soon as it happed server crashed tested with tnt and other creepers no crash only happens when its a rocket creeper for now i just disabled the that mob but i thought you might want to know about it.

Minecraft 1.12.2
Forge 2627
primitivemobs-1.1.6_beta
BiomesOPlenty-1.12.2-7.0.1.2325-universal
Crash Report https://pastebin.com/9LEbSTma
heres something some one said after looking at crash report for me may help may not.
[it looks like it cant get the proper block state when it drops from the explosion]

Thanks! This one seems pretty obscure. Will take a look.

I literally just had the exact same bug! Sad too, since that was my favorite mob. :( The animation is amazing. XD

Nvm fixed

Having a hard time figuring out how to prevent this crash. I think it has to do with something fall() tries to access after the block exploded... however disabling all fall results seems to not fix the issue.

Could you release the jar please? I've built my house in a silty grass biome and am getting this sometimes.

Try pinging him? He has been responding to issues on and off lately.

@Daveyx0