Solution What Can I Do If QoS Enabled Causes BufferBloat and High Latency on My Router After Firmware Update?
This Article Applied to:
Archer BE230_V1/V1.20
Archer BE230_V2
Archer AX55_V1
Archer AX55 Pro _V1
Archer AX72_V1
Archer AX72 Pro_V1
Archer GXE75_V1
Archer AX53_V1
Phenomenon:
Some users have reported performance degradation in their routers after enabling QoS following a firmware update.
Specifically, Bufferbloat test scores for both wireless and wired clients have significantly decreased (e.g., from A/B to F). Serbian_Fantom mentioned this unexpected behavior here.
Additionally, a noticeable increase in upload latency may occur, resulting in higher latency and jitter when the network is under heavy load.
Disabling QoS can resolve the performance degradation described above.
We have identified the cause of these unexpected behaviors. Please take a look at the following feasible solutions.
Available Solutions:
Solution 1:
Our development team has provided the following beta firmware to address this unexpected behavior for the models that have already been reported. Please install the beta firmware for your router if you encounter this anomaly.
| Model | Direct Download Links |
| Archer BE230_V1/V1.20 | Archer BE230_V1/1.20_1.2.1 Build 20250821(Beta Firmware) |
| Archer BE230_V2 | Archer BE230_V2_1.1.3 Build 20260127 (Beta Firmware) |
| Archer AX55_V1 | Archer AX55_V1_1.5.11 Build 20260205(Beta Firmware) |
| Archer AX55 Pro_V1 | Archer AX55 Pro_V1_1.4.3 Build 20251202(Beta Firmware) |
| Archer AX72_V1 | Archer AX72_V1_1.4.1 Build 20250918(Beta Firmware) |
| Archer AX72 Pro_V1 | Archer AX72 Pro_V1_1.4.1 Build 20250918(Beta Firmware) |
| Archer GXE75_V1 | Archer GXE75_V1_1.1.1 Build 20251024(Beta Firmware) |
| Archer AX53_V1 | Archer AX53_V1_1.5.4 Build 20251230(Beta Firmware) |
Note:
- Please be sure you have read the Beta Test Agreement before upgrading the beta firmware!
- For the sake of insurance, it's always recommended to save a copy of the router's Backup Config file before upgrading or downgrading.
- You may follow the guide to upgrade the firmware of your router. How to Upgrade the Firmware on the TP-Link Wi-Fi Routers.
Solution 2:
If you don't want to try the beta firmware, you can temporarily disable the QoS feature.
We welcome you to share your experiences with the beta firmware. If the beta firmware doesn't help, please provide details on your router's current operation and any other relevant information. Like the complete network topology, specific exception details, when the problem started, etc.
What if your router model isn't among those mentioned above, but you've also experienced unexpected bufferbloat and high latency after enabling the QoS feature during firmware updates? Please provide your router model, including firmware and hardware versions, for reference: How to find the hardware and firmware version of my TP-Link device?
Thank you for your feedback and support.
Update Logs:
Jan 29th, added Archer BE230_V2 Beta Firmware
Feb 5th, updated Archer AX55_V1 Beta Firmware
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Yes, this firmware version is universal.
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@Joseph-TP Hi Joseph. So the firmware will not lock my router to the EU version? I'm hesitated because I heard EU router has weaker WIFI signal and different channel due to local regulation. I just want to make sure before I install it. Thank you!
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Hi@Holiday25 ,
As far as I know, wireless conditions are restricted by identifying the hardware code. If your hardware code is not the EU version, you will not be restricted as a result.
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Hi @SilenceOfAura ,
We are delighted to announce the pre-release firmware for the Archer BE400 V1! This update has new advanced features. In particular, it supports IPv6 VPN, adds Wake on LAN and other new year features.
New Firmware for Archer BE400 V1 to Support IPv6 VPN, Wake On LAN, and More
It is recommended that you try this firmware and take advantage of the new features.
Any feedback and suggestions are welcome~
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Buenas, version beta ya para el ax55 v1 pro ?
el ultimo firmware 1.4.3 Build 20250813 rel.63911(5553) me da alta latencia bufferbloat .
gracias.
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@Joseph-TP Hi Joseph, I have an Archer GXE75_V1. After the firmware update, "If QoS Enabled Causes Buffer Bloat and High Latency," I experience issues. The problem is that when I try to download the beta version for my router here from this topic, I always get the message "Please go to TP-Link Official Website to get products, software, and services for your region."
I've tried using a VPN from various locations, but I still get the same error. I can download firmware for other models correctly.
I await your response. Thanks.
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Hello @Maurooo1 ,
Have you tried this beta firmware? Archer AX55 Pro_V1_1.4.3 Build 20251202(Beta Firmware)
You may follow the guide to upgrade your router's firmware. How to Upgrade the Firmware on the TP-Link Wi-Fi Routers.
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@iteo92 ,
Welcome to our community.
When you try to install the firmware, please confirm:
- Turn off all VPN software and proxies (including browser plugins) on your computer/phone.
- Ensure your computer is connected to the network of the router you are updating (i.e., the local area network that manages it) via Wi-Fi or wired connection.
- It's best to close other unnecessary network applications (such as online videos and large file downloads).
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Hi, thanks for replying. I'm still experiencing the letter C in LibreQoS or other Bufferbloat instances. Is there any secret setting that can fix this?
I downloaded that beta version; my download speed is 600 Mbps, but the upload speed is different and never the same with my ISP. It's coaxial. The fiber optic connection is ready, but it hasn't been activated in the area yet.
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