The dynamics probe rules out the last structural explanation: simulate=1 instance=yes profile=PhysicsActor A normal dynamic actor - and it still travels ~700 cm/s upward with vZ oscillating around zero. So the teleport is applied to a genuinely dynamic body, which is why not one of the force-shaped settings (gravity, mass, penetration, spawn height) changed anything. Recorded with it: the bisect plan for the next pass, because guessing at Chaos internals has stopped being the cheap option. Spawn the pawn in ReviewMap's empty floor to separate asset from world, and spawn a stock AWheeledVehiclePawn beside it to separate our setup from the engine's. Pawn parked; captures unchanged.
864 KiBLFS
864 KiBLFS