Imported Vertex Color not working

Hello everybody. In my environment project I came across a problem I could not solve.
I have long grass in my scene, which should move with the wind. To blend out the Worldposition Offset for the foliage I want to use the vertex color of the object.
I painted the vertex color in maya and exported the object as fbx file.

After importing the file in Unreal it looks like this (Vertex Color Import Option was set to Replace).

340082-v2.png