Reoccuring Warning InstancedFoliageActor_0 message

After a recent lightbuild I received 30 of these statements. Regardless of the quantity of meshes, even with meshes from the Epic, even with as few as one, I get these messages reliably.

Warning InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.

Warning InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component

Can anyone shed light on whats happening and how it can be resolved?

Thanks in advance,