I hit this problem every winter if I want to smoke a cigar at work. Smoking is not allowed inside, so I have to step outside beside the office for a cigar. That combination of cold weather and smoking a little faster plays havoc with the quality of the burn.
I can smoke just as fast in my smoke room at home, but when I go outside into the cold weather, it seems to cause the tar to build up a little faster and get the leaking effect. If I slow down a little, it does not happen. I am glad your reminded me as the weather starts to cool off. Maybe this year I can forego the "relearning process" of winter smoking.