Has anyone with this issue installed AdBlock and/or an ad-blocking HOSTS file? I didn't start seeing this problem until I did both.
Whenever I see this message I can go into the speedtest.net app and pull a continuous 60mbits down, pretty much maxing my connection, and I never see any actual stability issues.
I think the system may have some connectivity test that's being interfered with but I haven't had time to go digging through the logs yet, so I wanted to see if anyone else had done what I did to trigger it first.
Cool. It was the AdBlock. Just uninstalled AdBlock and "your wifi is unstable" message disappeared. Interesting... Thanks.