Did you try disabling "Parental Controls", "Antivirus" and "QOS" features? I have all disabled and no problems with the WiFi (Galaxy S10+) giving me the full speed (469/21).

I had some initial problems as well, but even after the latest update and a reboot of the complete net because of a power outage, I am getting 462 down, 23 up through WiFi on a Galaxy S10+ - the same...

I a very similar issue, just worse than what you get. TP-Link app reorts 462 down, 24 up Cabled, I get 450+ down and 23+ Mbps upload, Wifi with device sitting about 10 inches away from the main...

Nope, these are internal systems that are being blocked, not external scans. Disabling the complete set of "security features" the implemented so miserably actually solves the problem.

Same here. I will disable the antivirus and ips and see when they will fix it and provide options for managing the nonsense.