Each adding a static mesh not containing any collision data keeps increasing PhysX memory

// Takes actor ref arrays.
// #PHYS2 this used to return arrays of low-level physics bodies, which would be added to scene in InitBodies. Should it still do that, rather then later iterate over BodyInstances to get phys actor refs?
bool FInitBodiesHelperBase::CreateShapesAndActors()
{
...omitted...
		CreateActor_AssumesLocked(Instance, Transform);
		const bool bInitFail = CreateShapes_AssumesLocked(Instance);
		if (bInitFail)
		{
#if WITH_EDITOR
			//In the editor we may have ended up here because of world trace ignoring our EnableCollision. Since we can't get at the data in that function we check for it here
			if(!PrimitiveComp || PrimitiveComp->IsCollisionEnabled())
#endif
			{
				UE_LOG(LogPhysics, Log, TEXT("Init Instance %d of Primitive Component %s failed. Does it have collision data available?"), BodyIdx, *PrimitiveComp->GetReadableName());
			}
#if 0
			FPhysicsInterface::ReleaseActor(Instance->ActorHandle, PhysScene );
#else  // this is the workaround
			FPhysicsInterface::ReleaseActor(Instance->ActorHandle, PhysScene, true/*bNeverDeferRelease*/ ); 
#endif
			Instance->OwnerComponent = nullptr;
			Instance->BodySetup = nullptr;
			Instance->ExternalCollisionProfileBodySetup = nullptr;
 
			continue;
		}
 
		FPhysicsInterface::SetActorUserData_AssumesLocked(Instance->ActorHandle, &Instance->PhysicsUserData);
	}
	return true;
}