Actually, when I was pinging, I noticed that there was more latency with 1.1.1.1 than there was with
8.8.8.8, so I might try that with just the Channels host PC. For some reason I didn't think that was an option - to essentially bypass the gateway for DNS? For the PC's adapter settings, I had always set it to obtain DNS server address automatically. If I change it to Use the following DNS server addresses, can I set the preferred for Google (8.8.8.8) and the alternate to Cloudflare (1.1.1.1)? Does that ignore the settings on the gateway?
Edit: Okay, I've changed the network adapter settings to use the DNS addresses 8.8.8.8 and 1.1.1.1 and got great troubleshooting test results both for the Windows network and for Channels. I'm looking forward to seeing if this makes a big difference because I think it might.