Update: Well, it's been almost two weeks since I changed the DNS settings and swapped out the Ethernet cable, and I haven't noticed any drops. It may still be too early to tell, but so far it's...

I bought an Archer C7 v2 a few months ago, and I'm seeing very similar issues as those described in this thread. It's sporadic (sometimes ~3/day, sometimes ~1/week), but all my devices (Ethernet and...