so basically i have version 1.1.6 of biomes you'll go and the world will load normally, but a good chunk of the biomes do not load any of the trees or plants that are meant to be there. i tried the 1.1.5 and a few of the 1.1.7 on curse forge but they all either crashed when i tried to load it or it did the same thing.
is anyone else having this issue???

this is my mod list

and here are a few screenshots of biomes without anything (as you see in the top left the biome name)

Update BYG, update optifine.

since im on 1.16.4, the optifine version i have is the only available one, but what version do you suggest for BYG ??

All 1.16.4 mods basically work on 1.16.5. and i recommend BYG's latest

okay !! ive tried 1.1.10, 1.1.9, and 1.1.8 now (both with and without other mods in the folder) and my game has crashed for all of them so far. should i try updating forge to 1.16.5 as well ? I'm just worried about losing world data :0