Elaboration on my setting that are working without issue with V1.1.0 Build 20200427 rel.80857(5553). These settings also worked great on currently posted firmware version. Note that my network has 7 wired clients and 23 wireless clients. Most of the wireless clients are IoT devices connected to the guest network, isolated from my local network and from each other. I also have an RE500 extender wired to a TP-Link switch that has my entertainment system devices connected to it where get 280Mb/sec download speed. My Internet max speeds from provider are 300Mb download, 30Mb upload.

 

OFDMA: On

Smart Connect: Off

 

2.4 GHz

Security: WPA/WPA2-Personal

Version: WPA2-PSK

Encryption: AES

Mode: 802.11/b/g/n/ax mixed

Channel Width: 20MHz (maximizes compatibility and range with IoT devices)

Channel: 2

Transmit Power: High

Airtime Fairness: Off

 

5 GHz

Security: WPA/WPA2-Personal

Version: WPA2-PSK

Encryption: AES

Mode: 802.11a/n/ac/ax mixed

Channel Width: 40MHz (best compromise for range/speed)

Channel: 149

Transmit Power: High

Airtime Fairness: Off

Multi-User MIMO: On

 

Other Settings...

Do not hide SSID

WPS: Off

 

Guest Network

2.4GHz: On

5GHz: On

Security: WPA/WPA2-Personal

Version: WPA2-PSK

Encryption: AES

 

No Parental Controls

QoS Application Priority: Standard (default)

QoS Device Priority: No devices provided priority (didn't find feature added any value)

Antivirus Malicious Content Filter: Off (I have other protection)

Intrusion Prevention System: On

Infected Device Quarantine: On

Firewall Enabled

SPI Firewall: On

Allow Pings from the WAN Port: Off

Allow Pings from LAN Port: ON

Access Control: Off

IP & MAC Binding: Off

NAT Forwarding: Everything off except for ALG (all on)

 

IPV6: On

Internet Connection Type: Dynamic IP (SLAAC/DHCPv6)

LAN: SLAAC+Stateless DHCP

MAC Clone: Do NOT Clone MAC Address

 

VPN Server: OpenVPN Server enabled

Smart Life Assistant: Not Used

I do not use TP-Link ID for login nor Dynamic DNS

Having the same issue with AX11000