my new ax1800 drops the ethernet connection I have for a desktop pc and an android tv I have every couple of days for an intermittent period of time and then starts working by itself after several hours before I can figure out the problem. Meanwhile wifi works with no issues for all devices at the same time ethernet stops (including tv after I change to wifi in the settings). I can see my desktop has an ip assigned in the router client list, but isn't reachable when trying to ping thru the router webtool. a restart of the cable modem and ax1800 doesn't seem to resolve the issue. I don't have elaborate settting either, I basically plug&played out of the box. I have about 20 wifi clients that work with no connectivity issues. I haven't tried a hard reset yet, wanted to try to avoid for now while troubleshooting, but seems like my last alternative at this point. 

the only advice that online chat support gave me was to update to google dns, and that was the first thing I did out of the box when I was setting up the first time a couple weeks ago.