Hi,
I've spend last two days trying to solve this.
I use TWO scenes: ONE Xref scene with lights made in PFlow, and SECOND main render scene.
Since corona does not support particle systems, you must use some tricks like meshers or blobmesh compound objects.
When I render the original scene ONE, everythink is ok.
When I Xref scene ONE in scene TWO (even empty scene), my mesher/blobmesh objects dont render at all. When I Xref only one mesher/blobmesh usually it's ok. But referencing more than one meshers/blobmesh 99% at least one of them will not render at all