CAX80 Multi-gig ethernet port dropping

I have the same problem, 2.5gigabit cuts out. I've done extensive testing discovered the flaw with the cax80 is related to the wifi. When the frequency of the 2.4 & 5 Gig wifi are at the lowest settings the 2.5 multi-gig port cuts in and out every several hours or so. If you set the wifi frequencies for the 2.4 and 5 gig radios to the max the 2.5 multi gig port cuts in and out every 5 to 10 minutes. If you disable the wifi radios, turn them off, the 2.5 multigig ports work fine. I get 1400+ mbs downloads on comcast. I have disabled the radios and use anouther, R7000 router, as an access point. Very shameful of netgear as i have had the cax80 replaced once and now out off warranty stuck with a lemon of a cable modem/router (cax80). Several others have noted simular problem on reddit.