I cannot import meshes with 0 polygons for mobile foliage LOD

Hi all,
An Epic Games Member announced (somewhere in the forum) the platform dependent minimum LOD override for ue4.20 (which they used for fortnite on mobile devices)

So I thought I can use this to turn off grass by having an LOD with 0 polygons and use this as minimum LOD for mobile devices because the two sided grass foliage looks pretty bad on mobile devices and also causes low fps.

My Issue:
I get an error when I want to import a static mesh with 0 polygons.
I have several foliage types (trees, flowers, etc.) which I want to keep so I want to disable only 1 foliage type for mobile devices. Is there a way to import LODs with 0 tris or is there any other way to disable 1 special foliage type for mobile devices?

I use Blender btw.

Aww come on. Anyone?