Microcode SW error with an Intel 8265 / 8275 (rev 78) wireless card
The issue Multiple times an hour my wireless connection would drop out for a couple of seconds, then come back up. If this happened while streaming media, most often it would not be noticeable because the media buffer would handle the hiccup, but during regular surfing this would lead to disconnects or unreachable pages.
Troubleshooting Looking through the dmesg output I found plenty of tracebacks similar to this (MAC address of my router removed):