this image speaks for itself. Because the forest has the jungle tag, mods like repurposed structures that don't care about the dimension, only the biome type, can put structures that are meant to only be in overworld jungles, into thinking forests. Maybe... don't use the jungle tag?

Yeah. This is going to be fixed when i get to it. The Thinking Forest was originally intended to resemble a jungle, but that has changed.

Turns out this was also causing a really nasty crash with AE2. This should be fixed by 617c8e1.