when using custom terrain such as Williams or Terralith with block state culling on vines block state are broken and become ghost blocks underneath until updated, also this mod is amazing

Alright thanks for reporting it. I'll look into it

I seem to have this issue even without custom terrain. The vine simply needs to be placed on a block.

Experiencing the same problem when Block State Culling is on, but not only vines, but tall grass, lychen and sculk veins (sometimes)

I'm well aware, im working on fixing the issue

Fixed in v0.13.0