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TP-Link GX90 AX6600 Firmware 1.2.3 Build 20250603 - QoS Issues and Reboot Loops after this update

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TP-Link GX90 AX6600 Firmware 1.2.3 Build 20250603 - QoS Issues and Reboot Loops after this update

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TP-Link GX90 AX6600 Firmware 1.2.3 Build 20250603 - QoS Issues and Reboot Loops after this update
TP-Link GX90 AX6600 Firmware 1.2.3 Build 20250603 - QoS Issues and Reboot Loops after this update
2025-08-17 18:04:04 - last edited 2025-08-19 05:48:42
Model: Archer GX90   Archer AX6000  
Hardware Version: V1
Firmware Version: 1.2.3

Hello,

 

I’m experiencing severe QoS issues after updating my TP-Link GX90 AX6600 router to firmware version 1.2.3 Build 20250603 rel. 66228(5553). Even with QoS set to 100 Mbps for both upload and download, I’m getting significant bufferbloat, while my actual internet speed is 650 Mbps.

 

Additionally, the router has started entering continuous reboot loops after this update. I never experienced these issues before when using 300 Mbps up and down, and QoS worked fine.

 

Could you please advise on how to resolve these problems or if a rollback to the previous firmware is possible?

 

Thank you.

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1 Accepted Solution
Re:TP-Link GX90 AX6600 Firmware 1.2.3 Build 20250603 - QoS Issues and Reboot Loops after this update -Solution
2025-08-18 13:56:13 - last edited 2025-08-19 05:48:42

  @Kevin_Z I’ve already managed to solve the issue, following the guidance from a support agent. I actually fixed two problems by doing a hard reset using the reset button on the back of the router. This completely solved everything, including the QoS issue — it worked like magic. I pushed the router to the limit afterwards and didn’t have a single reboot again.

 

If you’re having the same problem I had, do the hard reset. The method I used was as follows (credit to Matheus Munhoz):

 

1. Hold the reset button for 15 seconds.

 

 

2. Unplug the router from the power outlet while still holding the reset button, and keep pressing it for another 15 seconds with the router off.

 

 

3. Plug the router back in and continue holding the reset button for 10 more seconds.

 

4. Then release the reset button and check if the router is back to normal.

 

Note: Do not release the reset button at any moment during steps 1, 2, and 3.

 

 

Recommended Solution
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#3
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Re:TP-Link GX90 AX6600 Firmware 1.2.3 Build 20250603 - QoS Issues and Reboot Loops after this update
2025-08-18 11:33:27

Hello @JayBen7, thanks for posting in the community.

 

I believe this QoS issue and Reboot Loops do not occur simultaneously, so could you please confirm how often the reboot loops occur? When the reboot loop stops, do you experience significant bufferbloat immediately?

 

Since this 1.2.3 Build 20250603 was released two months ago, and we haven't received similar feedback, I'm wondering if the unintended behaviors may be related to your specific network. Could you please clarify how the GX90 and AX6000 are connected and what specific advanced settings you've made on the two? We will try to figure out what settings cause the unintended behaviors in this new firmware with more detailed information.

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Re:TP-Link GX90 AX6600 Firmware 1.2.3 Build 20250603 - QoS Issues and Reboot Loops after this update -Solution
2025-08-18 13:56:13 - last edited 2025-08-19 05:48:42

  @Kevin_Z I’ve already managed to solve the issue, following the guidance from a support agent. I actually fixed two problems by doing a hard reset using the reset button on the back of the router. This completely solved everything, including the QoS issue — it worked like magic. I pushed the router to the limit afterwards and didn’t have a single reboot again.

 

If you’re having the same problem I had, do the hard reset. The method I used was as follows (credit to Matheus Munhoz):

 

1. Hold the reset button for 15 seconds.

 

 

2. Unplug the router from the power outlet while still holding the reset button, and keep pressing it for another 15 seconds with the router off.

 

 

3. Plug the router back in and continue holding the reset button for 10 more seconds.

 

4. Then release the reset button and check if the router is back to normal.

 

Note: Do not release the reset button at any moment during steps 1, 2, and 3.

 

 

Recommended Solution
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