Yesterday using my egg I heard a loud pop noise. Sounded like something cracked. It was too hot after my cook to inspect and disassemble. I plan on doing that today. Let all the charcoal burn out and I'm breaking out the shop vac. I ramped up the heat after a rib cook to make pizzas but it was only at about 450 degrees when I heard the noise. Does lump sometime pop like a natural wood fireplace?