same thing here, I discussed it last week:
https://www.hearth.com/talk/threads/67244/
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Well, i figured it out!
This year my Fireplace Xtrordinair 33 seemed to be burning pretty fast. I originally thought it was because my wood was super dry. It burning very fast, even with the air way down. I finally figured that it must be the gasket was just worn out (after 4 years of use). I am burning 24/7 and since the stove is always hot, haven’t done the dollar bill test.
Last night I reloaded and noticed the door was barely closing.
I noticed the latch that closes the door is held in place by a nut, and it was loose. So i just tightened it up (by hand) and now it is very tight. If I close the air it really shuts the fireplace down. I have to get used to where to leave the air control all over again.
But for those with similar fireplaces, Fireplace Xtrordinair 33 and 44 and the lopi declaration (probably a few others), this might save you some time!
Rick