Hello,

I’m experiencing a recurring problem with my Deco XE75 system, and I would like TP-Link support to investigate it. I’ve also seen other users reporting similar issues recently.

System configuration

• Main unit: Deco XE75 (EU) V1 – Firmware 1.4.3

• Satellites:
  • Deco XE75 – Dormitorio Principal (wired Ethernet backhaul to the main unit)
  • Deco XE75 – Despacho (Wi-Fi backhaul to the Dormitorio node)
  • Deco M4R – Cocina (Wi-Fi backhaul to the main unit)

Network topology

ONT/Router → XE75 (Salón – Main)
                 ↳ XE75 (Dormitorio – Wired backhaul)
                        ↳ XE75 (Despacho – Wi-Fi backhaul to Dormitorio)
                 ↳ M4R (Cocina – Wi-Fi backhaul)
 

Problem

The 2.4 GHz band randomly stops working ONLY on the Deco XE75 in the master bedroom, even though that unit is connected by a stable Ethernet backhaul.

Symptoms

• All 2.4 GHz devices near that node disconnect.

• The Deco continues to appear online in the app, with no warnings.

• 5 GHz and 6 GHz continue working normally on that satellite.

• The other XE75 units and the M4R work without issues.

• The issue is only solved by rebooting the affected XE75, but it eventually returns.

Additional details

• The system was completely stable before. The issue started recently.

• The Ethernet cable is factory-made and verified as good.

• Wi-Fi interference scan shows "Perfect".

• The issue happens even with 6 GHz disabled.

• Fast Roaming and Beamforming were tested OFF, but the problem continued.

• The problem never affects the other XE75 units.

• The M4R is unrelated.

Troubleshooting already performed

• Full Deco system reboot ✔️

• Rebooting only the affected XE75 ✔️

• Disabled 6 GHz ✔️

• Disabled Fast Roaming ✔️

• Disabled Beamforming ✔️

• Channel width changed ✔️

• Ethernet backhaul verified ✔️

Request

Could TP-Link engineering please review whether Firmware 1.4.3 has a bug affecting the 2.4 GHz radio in XE75 satellites, even when they use Ethernet backhaul?

I can provide logs, screenshots, or run any diagnostic tests if needed.

Thank you.