This is true for most assets. For Generic Shooter though it has some config settings that need to be moved with it. Without those critical config settings, bad things will happen. Many people make mistakes when migrating config settings (I have many emails to prove that). The marketplace team has acknowledged this is a problem and they are working on a fix asap.
Ragdolls are still Pawns. These should be destroyed in 10 seconds as their Lifespan is set. You could loop through all pawns and see if they have a controller on the server and if they don’t, destroy them. I think zuert’s route may be better so you don’t have to deal with not getting the right info on initial spawn.