Tootfinder

@… Might sometimes still be -- DOCSIS QoS will priotize specific traffic when the channel doesn't have the capacity.
But I don't think there's much to fix there for you, just wait and pray.

@… DOCSIS has some really crazy mechanisms for QoS when your segment is congested, I really can‘t quite believe that‘s what you’re seeing in your rural area, though.
Are you running a DOCSIS 3.1 capable modem? What are your upstream measurements like? All channels running on proper modulation modes?