My '20 poverty version does this on occasion also. Charcoal can removed. Doesn't seem to matter full fuel tank or not. Usually it's when coming to stop after a sudden deceleration. Leisurely roll to a light rarely stalls. Doesn't happen enough to really bother me. I do have a TWM fuel cap...but again, doesn't seem to correlate to fuel volume in tank. Not sure of ambient air temp correlation in my case.