Tried entering the primordial caves in a server with my friends and all I found was a TON of cave centipedes and murmurs. no clue what is causing this, but it makes it nearly unplayable.

You probably have TACT, right? Since that mod puts all of the caves into the "#forge:is_cave" and "#minecraft:is_overworld", murmurs and cave centipedes spawn.

You probably have TACT, right? Since that mod puts all of the caves into the "#forge:is_cave" and "#minecraft:is_overworld", murmurs and cave centipedes spawn.

Yea, either you delete the tact mod or disable murmur and cave centipede spawn on primordial cave