I can’t be the first person to notice this issue:
I made a tree with the Unity Tree Editor, created some LOD meshes for it in an external program and assigned them to it with a LOD component. On the prefab itself, the wind and LODs work fine together.
Once I assign the prefab to the terrain editor as a tree and paint a load, I notice it doesn’t work. Also once I click ‘add tree’ and select it, the popup doesn’t mention the Bend value which it usually does.
I noticed that you can paint trees that have LODs without wind working, or remove the LODs and the wind will work, but there is no way to do both (!!!)