I had something I’ve never seen before happen. I was running the stove with cat engaged for about 2 hours and noticed the cat was still glowing orange but didn’t seem like anything was going on with the wood. No secondaries firing or flames at all. I had the air all the way closed down. I checked the cat temp with the probe monitor and it was 1350. I bumped the air control a bit to allow a bit more air and I heard a puff and then flames through the firebox. Immediately the cat probe temp dropped down to 1100 within 5 mins. Can anyone explain what happened? Thanks in advance for your time.