Ha. I got one of the 10G Thunderbolt adapters a several years ago. And eventually started having problems with Zoom calls around noon. With dropped connections and stuttering. Zoom restarts usually fixed the problem.

After it happened 3-4 times, I started debugging. It turned out that we usually get at least a bit of sunlight around noon, as it burns away the morning clouds. And my Thunderbolt box was in direct sunlight, and eventually started overheating.

And a Zoom restart made it fall back onto the Wifi connection instead of wired.

I fixed that by adding a small USB-powered fan to the Thunderbolt box as a temporary workaround. I just realized that it's been like this for the last 3 years: https://pics.ealex.net/s/overheat