Custom tree on terrain with LOD gets no Bend Factor when adding to terrain

Hello,
I just created a custom tree in Blender with 3 different level of detail meshes and moved him to Unity. The LOD Levels got automatically setup and are just working fine. If I add a single LOD level to the terrain it is just working fine. Unity asks me for a bend factor while adding the tree to the terrain and the model is shaking in the wind. But when I try to add the collection of the LODs to the terrain I do not get this bend factor option. I can place the tree with the terrain tools and the LODs are working fine when running the game, but however, wind animation is not working. So my question is what I am doing wrong? Is possible to make trees together with Lod affected by wind? Because the non LOD version has a huge impact on performance.
Thank you for your help!

 

yeah I am wondering the same thing....

 

Have noticed this issue also in Unity 2019.1.0f2

 

Any update on this? It is any workaround?

 

Also noticing this. Don't want to choose between wind and rotation on custom trees.

 

I don't have Bend Factor option either. Could anyone find the solution?