I can't shed much light other than to say i got them too on my wrt1200 v1 w/17.01rc. There is this from the release notes for 17.01 rc -
Improved Networking Support
Smart Queue Management (SQM) minimizes bufferbloat by using the
cake and fq_codel qdisc's.
So maybe LEDE will just be focusing on cake and fq_codel.