Hi,

I wanted to have a peaceful overworld, so I made a very simple rule in the spawn.json. Just this:

[
{
"hostile": true,
"dimension": 0,
"result": "deny"
}
]

Once I switch the world from peaceful to normal or hard I start having major tps issues.
Initially I thought it could be something else until I tried removing InControl and noticing that the TPS issue did not exist when changing dificulty. Only with InControl and when I was not in Peaceful.
I run a LagGoogles profile and I got this result, that doesnt tell me much but might give you some lights on what could be going on: https://imgur.com/ioI9u0H

I also had Lycanite mobs installed and I removed, it but I am also using Not Enough Items (big mistake) and now, when I load a world, I always see the warnings about missing blocks in the logs. Could the "missing" entities also be causing these issues?