Yes like it disconnects and then reconnects, game stutters, goes into loading screen and then puts me back into the game and it does that off and on for like a couple mins. I'm trying to see if I can get it to do it again so I can send you the system logs. I do have geo-filter on, I can try turning it off and seeing if it happens again. As for connection drops happening on other devices, I've mainly noticed it on my iPhone from time to time and smart TV's while watching Netflix.
For traffic routing, I haven't really messed with any DMZ or bridge settings, just whatever the default or standard is. Same for congestion control, have not configured any of those settings. Honestly just plug and play for the most part with the modem and R3.
Modem I am using is a spectrum modem, I will link it below..
Spectrum eMTA User Guide-cross.pdf (d15yx0mnc9teae.cloudfront.net)