Twice now this year starting woth a cold stove I have had smoke come out of the bottom back of the stove. It is coming out of a hole about 1" diameter even though it is not quite round. This hole is located directly above the primary air intake. I assume it is the supply for the secondary burn tubes. I have been doing something different this year starting my fires and wonder if it is the cause. I have been using about five pine cones surrounded with small splits, and it is very smoky inside the fire box right at first as the pine cones take off, I do not have any smoke spilling out the door, once a good draft is established I have no more issues. I assume the smoke in the firebox is going throught the seconday air tubes and out this hole, any thoughts on this. I did not see this issue at all burning 24/7 last year and have only seen it twice this year. Other than this the stove performs perfectly except for these 15 seconds right when I light the stove.