When a player is in foliage, they take damage; in vanilla leaves, there is no damage.

All leaves or only a certain type and what do you mean by inside of leaves

With all the foliage from BWG, If you walk into the foliage from BWG, the player will start taking damage.

What version of BWG

BWG: 1.6.5 MC 1.20.1

I can't recreate this, please send in a video

https://github.com/user-attachments/assets/9e304321-075d-486d-8837-13a7a5194484
The same thing happens if you teleport into them, or get there in some other way.

So first thing, You can't walk into leaves in Vanilla, so there must be something else allowing you to even do that, and whatever that mod is will cause this to happen because it's probably only checking for vanilla

Is this Forge or Fabric

fabric