RBR40 wired to quantum FiOS only getting half speed download

I had reported a gist of this before, on another thread, but here it is again, with way more structured detail. I really do believe this is a bug with the internal Speedtest. Here is why.

Setup I created this morning: Directly connected my PC to Orbi Router RBR50v2's LAN port. There isn't much of a network activity going on in my house, nor in the small neighborhood I live in, that might overload either the router on my network or the Comcast capacity coming into the neighborhood (since cable internet is basically shared by your neighbors, unlike phone-based internet that is a direct dedicated line between you and the phone company).

• My service I am paying for: Comcast 1000/40
• Running internal SpeedTest app on Orbi with latest firmware: 516/42
• Running latest SpeedTest Win10 app on the latest Win10 PC against COMCAST.COM server: 511/54
• Running latest SpeedTest Win10 app on the latest Win10 PC against SPEEDTEST.NET server: 930/43
• Running in the latest Chrome Browser on the latest Win10 PC the Netflix-powered FAST.COM: 1.1/39

So, my PC is certainly able to see WIRED 1000/40 speeds when it is connected to the right internet servers. However, testing against certain servers straight from my PC is sub-1000, and the internal SpeedTest app on the Orbi is definitely stuck at reporting ~500 which is:

• either because it has a bug in testing (so, it detects half the speed) or
• because it has a bug in reporting (so, it reports half of what it found) or
• because it is picking a slow server to run against (so, the test server it uses is limited to 500).

I am attaching screenshots of my tests so that there is no confusion.

Tuna