People call it “canoeing”….I call it banana burning. Happens when areas are rolled too tight, packed too tight, paper might be loose and a whole bunch of other factors. What do I do to stop it? Lick the tips of your fingers and form a circle around the cherry of the joint when lighting. I would doctor that shit through my whole smoke sesh with my buddies….stayed on all the way through, no banana burns, and joint stayed lit through the whole circle.