Lag and block error

[MrBCraft]

after playing for about 15 min straight my Game started to have fps drops a LOT and also the longer i play the more lag there is when i try to place a block idk why this is happening but it is egtting super hard to play

[MrBCraft]

[jkingstonc]

I would guess this is due to regenerating chunk data that was previously already generated. this is a common issue in voxel games as is an easy oversight to make