Had to select "Archer BE550" because "Archer BE550 PRO" is not available in the Model drop down. Hardware Version: Archer BE550 Pro v1.0

The Archer BE550 Pro appears to have an odd bug with Airtime Fairness. I have a 1Gbps+ symmetrical WAN connection.

With Airtime Fairness disabled, 5Ghz network speeds plummet and hover around 140-200mbps tops. 6ghz band and speeds do not seem to be affected. What's strange is that after disabling Airtime Fairness and rebooting the router, speedtests will briefly show expected speeds on 5ghz, then something seems to be capping DL speeds at the router level to ~140-200mbps tops.

With Airtime Fairness enabled, 5ghz speeds revert back to expected for a 2x2 MIMO, 80mhz client.

Strangely enough, the Archer BE550 (non pro variant) does not come with Airtime Fairness enabled, yet the BE550 Pro does by default. 

The issue with the BE550 Pro right now is that with Airtime Fairness enabled, my Aquara G2H Pro Camera experiences constant network connectivity drops (did not happen with BE550, Airtime Fairness disabled by default). However, if I disable Airtime Fairness, drops with the camera are resolved, but the 5ghz band and its speeds suffer dramatically.

The reason I strongly believe that this is a bug with the router's firmware is because I had the exact same client set up, SSID configuration, and router location with the BE550 (non pro) which came by default with Airtime Fairness disabled, and it did not exhibit any odd 5ghz speed issues or camera drops. 

Can you please have the developers take a look into this? Airtime Fairness is normally a feature left off by default on most routers due to the fact that it can cause issues with legacy 2.4ghz clients. I am more than happy to provide more information/diagnostics/testing as I can (within my capabilities).