It seems to be really strange with the wagons from the F45 pack. Those bulkhead wagons, again, don't have any sound child blueprint inside their BIN files. I tried to add it inside the "ContainerComponent" part as that's where it normally should go to. So I inserted the code correctly for the sound right under the cargo load entry (loaded with planks) for all four bulkhead flats (one empty, three loaded) in its own "EntityContainerBlueprint" group. All tags have been closed.
When I went into the game to test it, the sound appeared and the flats weren't silent but the cargo disappeared! So I had a train with empty flats only although I inserted all four types of those flats into a free roam scenario for testing. When I deleted the sound child blueprint, the cargo appeared again.

What is going on here? Seems like I can't add the sound to the wagons without losing the cargo load. Can someone help us on that?
