Potentially the same problem, except you shift it forward in time. So perhaps the factory staff can recover and get back to work before the buffer runs out. Or competitors can ramp up production in time to compensate. Point is, a buffer is adding inertia into the system, an integrating block, which is often a good thing, as it eats oscillations. It's essentially the same reason you put capacitors next to the power supply in electronics - they eat voltage spikes, preventing your device from shutting off just because it briefly drew more power.