Modpack Version:
e.g. 0,2,14

Describe the bug
Dark Oak sapling now growing when twerking,

I'm assuming:

a) you meant to say that a dark oak sapling is not growing (rather than is "now growing")

and

b) that you were trying to grow a single sapling instead of putting them down in a 2x2 arrangement

and so I'm closing this for now. If I've got this wrong, please reply to this issue and provide me with more detail and I will re-open it and take another look.

A single sapling or the usual 4? Dark Oak trees require 4 saplings in a 2x2 arrangement in order for them to grow - just like in Vanilla Minecraft.