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Deco XE75 – 2.4GHz band disappears randomly on one satellite using Ethernet Backhaul

Deco XE75 – 2.4GHz band disappears randomly on one satellite using Ethernet Backhaul

Deco XE75 – 2.4GHz band disappears randomly on one satellite using Ethernet Backhaul
Deco XE75 – 2.4GHz band disappears randomly on one satellite using Ethernet Backhaul
Sunday
Tags: #Network Connectivity #Deco Ethernet Backhaul #Firmware Update #Deco EasyMesh
Model: Deco XE75   Deco M4  
Hardware Version: V1
Firmware Version: 1.4.3 Build 20240926 Rel. 38336

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.

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#1
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6 Reply
Re:Deco XE75 – 2.4GHz band disappears randomly on one satellite using Ethernet Backhaul
Sunday

  @AbreahamMG There is firmware 1.4.5 available on this website and you can try to update manually from Web UI.

 

https://www.tp-link.com/us/support/download/deco-xe75/v1/#Firmware

Please & Thank You !! ❤️
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#2
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Re:Deco XE75 – 2.4GHz band disappears randomly on one satellite using Ethernet Backhaul
Sunday

  @AbreahamMG 

Hi @ARGamingPK1, thanks for the suggestion!

I’ve checked the link you shared, but that firmware version (1.4.5) appears to be for the US hardware version, while my Decos are EU V1, which currently only offer Firmware 1.4.3 as the latest update.

Since cross-region firmware is not compatible and may cause issues, I prefer to wait for an official EU release — unless TP-Link staff confirms that 1.4.5 is safe for EU units.

Thanks again for your help!

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#3
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Re:Deco XE75 – 2.4GHz band disappears randomly on one satellite using Ethernet Backhaul
Yesterday

  @AbreahamMG 

Update on the issue: all IoT devices are now moving to the Deco M4R

 

Hi again,

 

I want to provide an important update because the problem is getting worse:

 

All 2.4 GHz clients (IoT devices) are now moving automatically to the Deco M4R in the kitchen

, even when the other 3 XE75 units have much stronger signal and are much closer.

 

  • The XE75 in the master bedroom does not accept ANY IoT devices anymore.
  • The XE75 in the office accepts 0 IoT devices.
  • The XE75 in the living room only keeps a few.
  • The Deco M4R keeps ALL 2.4 GHz devices (16 clients) even though it has the worst position and the weakest link.

 

This strongly suggests that the XE75 units stop broadcasting the 2.4 GHz band properly after some hours, so all IoT devices migrate to the only node still announcing it correctly (the M4R).

 

Important observations:

 

  • A full “Restart Network” from the App does NOT fix it.
  • Restarting nodes one by one does NOT fix it.
  • Only a full electrical power cycle (switching off the whole house circuit breaker) forces the XE75 nodes to restore 2.4 GHz temporarily.
  • After some hours, the problem comes back.

 

This looks like a firmware bug affecting the 2.4 GHz radio on EU XE75 (V1 – FW 1.4.3).

 

Could you please escalate this to engineering? I can capture logs if needed.

 

Thank you again.

 

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#4
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Re:Deco XE75 – 2.4GHz band disappears randomly on one satellite using Ethernet Backhaul
Yesterday

The Deco Xe75 is a complete disappointment. We paid a ton for this product, but it claims to select the Wi-Fi channel using AI, but it doesn't even work. Can I get a single logical explanation for why we can't select this channel ourselves? I'm going to throw this product away at this rate.

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#5
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Re:Deco XE75 – 2.4GHz band disappears randomly on one satellite using Ethernet Backhaul
Yesterday

  @AbreahamMG 

Hi, thank you very much for the feedback.

Did you set Deco XE75 into "Access Point" mode?

Network topology

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

 

How about the firmware of your Deco M4?

 

I've left a message with a beta firmware for Deco XE75_v1. Could you please test whether this version helps?

Wait for your reply.

Best regardss.

 

▶Check What's Currently Going on With Deco ▶Deco X50_V1_1.8.0 Significantly Expanded the Client Connection Details and Added Channel Selection ▶Deco BE85 1.2.0 Enhanced Mesh Backhaul Stability and Device Roaming Experience ▶Deco BE65/BE65 Pro 1.2.0 Enhanced Mesh Network Stability and System Security ▶Deco BE75 1.1.0 Added WireGuard VPN, Manual Channel Selection and More Try to leave a Message if urgent help is required.
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#6
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Re:Deco XE75 – 2.4GHz band disappears randomly on one satellite using Ethernet Backhaul
Yesterday

  @AbreahamMG Hi @David-TP, thank you very much for your reply.

 

To answer your questions:

  1. The Deco XE75 units are set to Router mode, not Access Point mode.

  2. The Deco M4 is working correctly. The only issue occurs when the 2.4 GHz band of the XE75 in the Bedroom stops broadcasting; at that moment, all IoT devices connect to the M4 even though it is much farther away.

 

I’ve checked your private message with the beta firmware for Deco XE75_V1.

 

I will review it, install it, and test whether this version solves the issue.
 

I will let you know the results as soon as I complete the testing.

 

Thank you again for your support.

 

Best regards,
Abraham

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#7
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Helpful: 1

Views: 153

Replies: 6

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Network Connectivity Deco Ethernet Backhaul Firmware Update Deco EasyMesh
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