@XMAdmin 

Hi, you may try to enable the Smart Connect?

TP-Link Smart Connect allows the router to automatically assign connected devices to the Wi-Fi band that provides the fastest speed. By balancing the load and assigning devices to the most appropriate band, Smart Connect can reduce delays and interruptions.

When Smart Connect enabled, the router’s 2.4GHz and 5GHz networks share the same SSID (network name) and password. You can enjoy a seamless connection between 2.4GHz and 5GHz networks.

  @XMAdmin I had similar issue - Connectivity to some of my my devices were experiencing intermittent high latency and packet loss to the tune of up to 55% packet loss and ping times (32 byte packets) of over 3000ms.  I downgraded the firmware to the previous release (1.3.5 Build 20230922 rel.71211(5553), and the problem seems to be resolved.  To be a little more specific, I'm running an Archer AX73 v1.0.  I'm turning off the "Auto Update" feature for the time being

Using latest firmware :
Ping statistics for 192.168.1.179:
    Packets: Sent = 100, Received = 45, Lost = 55 (55% loss),
Approximate round trip times in milli-seconds:
    Minimum = 3ms, Maximum = 3891ms, Average = 507ms

Using previous version:
Ping statistics for 192.168.1.179:
    Packets: Sent = 100, Received = 100, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 2ms, Maximum = 411ms, Average = 27ms

I hope this helps.

  @XMAdmin Same problem, after upgrade AXE75  my speed has dropped from 600 mb to 400 mb and the speed is not constant, last firmware is not good

  @KaioShin  

KaioShin wrote

  @XMAdmin Same problem, after upgrade AXE75  my speed has dropped from 600 mb to 400 mb and the speed is not constant, last firmware is not good

Solved, you have to do a factory reset after updating the firmware, the update has many changes and it is mandatory to do the reset, the bad thing is that it is useless to make the backup copy because then when you put it after the reset it continues to work badly, so after the reset you have to start from scratch to configure the router again.