Intriguing, but: I don't think it's working as intended from my Brave browser.
After about 2 seconds of blue/green pings that seem faster than should be possible (<10ms), it goes full red.
It does work in Chrome! (Perhaps, Brave is doing some faster-fail on the probe request from the beginning, and then a cached-insta-failure after ~2 seconds?)
Had the same issue here, Brave blocks "insecure" scripts, you'll see a warning in the address bar and need to allow it to load those scripts to get it to work correctly.
After about 2 seconds of blue/green pings that seem faster than should be possible (<10ms), it goes full red.
It does work in Chrome! (Perhaps, Brave is doing some faster-fail on the probe request from the beginning, and then a cached-insta-failure after ~2 seconds?)