MassTraffic in VR

Hi there! I have problem while using mass spawner in VR scene. It looks like VR inputs breaks when i have mass spawner on the level, OR, maybe it’s some NavMesh issues. If i deleted mass spawner, or changed spawn count for 0, or uncheked “auto spawn on begin play”, it starts to work correct again.
In the same time it works perfectly with keyboard and gamepad.