Vinicius de Oliveira Lopes

I experience the same lag issue. When holding or dropping an iron bar the game dropts to 5 fps. To replicate this you just need to hold or drop an iron bar, 100% chance of happening

This bug happens to me too, map completely invisible and sometimes it glitches

I have the same bug as well. Lava pools don't emit any light, they can be lighted by torches (because the torch light is brighter than the lava itself).