Painted Foliage Disappears on Datasmith Reimport

I painted trees with the foliage tool into my unreal file, but then when I reimported a new Datasmith file, and they disappeared. The topo they were attached to was the same in the new Datasmith file, so that hadn’t moved. Is there a way to change this so I don’t have to redo the trees every time I want to bring in a revised Datasmith file from Rhino?

Thank you