[horseman]

Originally Posted by mecster09

Like I said' I've had a cable repull recently after 5 technicians struggled to identify a previous issue and their last resort was a repull (which fixed it). I've had a full recable internally and externally during that process and for 2 weeks my connection was perfect. Most recent engineer changed the SuperHub and ran some connectivity tests on the coaxial and externally and I quote "I can't find any reason for you only getting one downstream or upstream"
Network technician also couldn't find a fault externally

Well if Principal Tech already escalated it to Networks and the engineer (not tech) couldn't find the fault behind partial/impaired service then they would/should have escalated it to head-end CMTS specialist for a full DOCSIS trace analysis.
Of course they're presumably not helpfully disclosing how many other other CM's on your cable segment they've checked or are not suffering the same symptoms which means they should now be looking at your mains phase power regulation. Presumably it's isolated to your property which makes it an expensive and intrusive diagnostic vector to explore.