Hi everyone,

I’m currently using a TP-Link Archer AX series router (AX55, firmware up-to-date) and I’ve noticed a recurring issue:
After a few hours of uptime, my Wi-Fi speed drops significantly, while the wired Ethernet connection remains stable. Restarting the router temporarily fixes the problem, but the slowdown returns after a while.

Here’s my setup and what I’ve tried so far:

Setup Details:

• Model: Archer AX55

• Firmware: Latest (updated manually via TP-Link site)

• Internet Plan: 500 Mbps fiber

• Devices: 2 phones, 1 laptop, 1 smart TV

• Mode: Router Mode

• Channel Selection: Auto

 Troubleshooting Done:

• Rebooted router and modem

• Changed Wi-Fi channels manually (no improvement)

• Disabled Smart Connect

• Tested with and without QoS enabled

• Factory reset and reconfigured from scratch

Despite this, the Wi-Fi speed keeps dropping after several hours.