Hi, i had a problem, when an enemy spawn invisible and player look around it the fps drops at 3 fps stables. i update the last version and in the latest version now continue doing that, but isnt 3fps, now are 14-15.

When im not looking in the enemy position i have my normal fps, only have drops when invisible enemy spawn and it is on my view.

I supose that if i do that:
# Disable mobs that use the Invisibility status effect when far from a player.
B:disableInvisibility=false

and set that "true" it fix the problem, but I don't think i have to do that for dont have really insane drops performance

Im playing in version 1.12.2 with last mod version and in a server

Without a proper log we can't really do much.

same crap happend to me. The console is being bombarded with this: https://pastebin.com/fTYBmxE4

And if you attacked bugged entity some weird visual bugs can occur like ur screen can go completely white.