Well I tried your solution, adding an offset to the poseable mesh component. I also tried adding an offset and so far none of it has worked for me. I think it has something to do with the way the mesh collides with the ground, though I have no solid evidence of that. I’ll try going to the extremes, making sure that the mesh is absolutely not colliding with the floor when it spawns.
In the meantime, though LeoCurtss found a solution, I still consider this an unresolved issue. I would love to get some Unreal staff in here because this seems like a pretty reasonable use case if you want to leave behind ragdoll corpses. Help!