I did this test on the 5GHz wifi band. I don't know why the download speed is so low. Whether it's interference, congestion (unlikely), or if my device took a knock at some point and it doesn't handle 5Ghz range well anymore.
Or whether it's ISP related. I have been having speed and latency...
20/20 mbps fibre. Sometimes it performs as expected. But the app only lets us test to your local server. For some reason I get full speeds on local sites and half speeds on international, non-mirrored sites.