1.sockets are added in Sedan_Skeleton. I have used sedan’s mesh also for actor that will be attached to pawn vehicle, because it’s only one sk mesh in Vehicle default project
2.blueprint of actor that used as attachment is blank, other blueprints are not modified
3.yes it crashes blank project
In my particular project it’s a tank vehicle(pawn) and turret(actor), during gameplay on listen server I spawned turret and attached it to my tank, then I move(AttachTo) camera from vehicle to turret, and it works fine until I start to move vehicle, which leads to crash.