Vegetation Issue after packaging

The Issue is simple: After Packaging everything inside the vegetationactor (Painted foliage) loses its material and texture completly. Its just a raw mesh with the ue default texture. Not even Material animation is active.

Because it takes 2 hours to build my project i couldnt make further tests… but there are foliage meshes inside my levels that arent painted wich work perfectly fine… Only vegetation is broken completly.

Solved: Set the material attribute: Instancing.