MC: Latest 1.16.5
Forge version: Recommended 36.1.0
Twilight Forest version: 4.0.412
Link to crash log: None, game didn't crash
Steps to reproduce:

1. generate chunks into the dimension
2. Locate Giant Twilight Oak

What I expected to happen: Them to generate whole.

What happened instead: Some of them are cut off like below:
Example 1
Example 2 (some are even floating pieces of tree).

Seems to happen with Dark Oak leaves as well, especially when bordering with another biome:
Dark Oak example

I'm not sure of this but this seems to happen when spawn immediately in chunks (through portals as always or with the teleport command and also seems to happen as i explore the world. It doesn't seem to happen to big dungeon structures (luckly, if that's the case).

Edit: edited some info to avoid confusion.
Edit2: happens with mushrooms too (not the "mushroom castle").

closing this as it seems like these are fixed now, the only current lingering issue is a small one with hollow trees but I opened a new ticket with more details about it: #1292