I have created a custom Dataprep block where I replace all actors using the same static mesh (instances) with a HISM (Hierarchical Instanced Static Mesh) taking the original actor transform and using it to each corresponding HISM instance.
While in Dataprep “scene” all HISM instances display as no transform, but when Dataprep is committed everything works well (apparently)
Not sure if that is expected or it’s a bug