I am running everything on 4.16.9. It seems the culprit is sch-cake. tc-adv at d52fe00 and sch-cake at 66e5d6 : detailed stats are printed tc-adv at d52fe00 and sch-cake at 842d7f : details not printed anymore. Could it be that the culprit is sch-cake at 842d7f? George