Assuming the issue is with the actual sqm-scripts and not some of the olther core components like tc/ip/kernel modules, the followong site has instructions how to upgrade to the latests sqm-scripts: https://github.com/tohojo/sqm-scripts
And yes, it would be nice to continue debugging this with the most recent version of SQM
Hey guys, i know I'm late to the party but this issue has been giving me a massive headache.
I've just fixed by removing WAN6 interface, hope this helps someone else!
Thanks for letting us know! Will definitely try this. What I do is restart sqm in system-startup in luci config and that seems to work for a while at least.