AX55 V1 Firmware 1.4.1 QOS massive latency / Bufferbloat - Can I rollback?
AX55 V1 Firmware 1.4.1 QOS massive latency / Bufferbloat - Can I rollback?
I recently updated to firmware 1.4.1 (from 1.3.3)
Now I am seeing huge latency spikes when upload / download testing using speedtest.net and waveform bufferbloat tester (which i was scoring A+ on). I have had an internet speed increase so my QOS is now set to 400 down / 40 up. But even using 100 down / 10 up is showing increased latency from what I was used to from the previous firmware.
I noticed another similar issue posted on this forum Archer AX55 V1 bufferbloat - Home Network Community.
I saw that the firmware update for version 1.4.1 said it can't be downgraded. So I would like to know is it possible / how I can safely downgrade to v1.3.3? I have the firmware file from the website and I can upload it through the router firmware upgrade interface but I don't want to brick it.
Please advise.
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Hello @Gegga ,
Please try the beta firmware available at the link below: Enabling QoS on the Archer AX55 May Cause Latency and Buffer Bloat .
Let me know if it can help and what the test results are.
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Hello @SyrupSandwich ,
Thanks for your feedback.
I will send you a beta firmware via message. Please install it manually. How to Upgrade the Firmware on the TP-Link Wi-Fi Routers (New Logo)
Feel free to reply here if you have any updates.
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I am glad to hear that the firmware can help you.
Please enjoy the network of the router!
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I too urgently need beta fw, this latency spike issue is severe. AX55 v1.0 EU
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Hello @Gegga ,
Please try the beta firmware available at the link below: Enabling QoS on the Archer AX55 May Cause Latency and Buffer Bloat .
Let me know if it can help and what the test results are.
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I'm also on 1.4.3 Build 20250813 rel.63911(4555) and have noticed a huge spike in latency when enabling QOS. Seems completely broken.
Firmware Version
1.4.3 Build 20250813 rel.63911(4555)
Hardware Version
Archer AX55 Pro v1.0
I'm located in Australia. Is there a particular firmware that you can send me ASAP that I can roll back too? The 1.4.3 build mentions you can't downgrade??
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Hello@LGrizL ,
Have you tried the beta firmware of the thread: Enabling QoS on the Archer AX55 May Cause Latency and Buffer Bloat?
Here is the link: Archer AX55_V1_1.3.5 Build 20250918(Beta Firmware)
- Please be sure you have read the Beta Test Agreement before upgrading the pre-release 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.
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I am experiencing a similar issue with ping spikes when using QoS.
Device: TP-Link Archer AX55 v1.0
Firmware Version: 1.4.1 Build 20250821 rel.70686(4555)
Internet Connection: FTTB, 100/100 Mbps
Wireless Settings:
OFDMA: Enabled
TWT: Disabled
Smart Connect: Disabled
QoS/Data Prioritization: Enabled for the Android TV box and the laptop
ISSUE:
On my laptop, while playing the online game Hunt: Showdown, there are persistent and large ping spikes. These spikes occur when the TV box is streaming IPTV (HD, OTT not VLAN). If no IPTV or other live streaming is running, the game ping is stable. Moreover, when watching live video (YouTube, IPTV) on devices over both Wi‑Fi and Ethernet, no buffering or stream interruptions are observed. This indicates that the ping spikes issue is not related to the ISP and is most likely caused by the router.
It seems that the QoS function incorrectly allocates priorities under IPTV network load, causing bufferbloat and resulting in ping spikes in online games.
Please investigate this issue and include a fix in future firmware versions.
Additional Information:
- TV box is connected via Ethernet.
- Laptop with Wi-Fi 6 is connected on 5 GHz (channel width 20/40/80 MHz, channel 44) at 1 m from the router. IMPORTANT: Even when the laptop is connected via Ethernet, ping spikes persist.
- Speed test via Wi-Fi with QoS enabled (speedtest.net): Download 83.79 Mbps, Upload 85.69 Mbps, Ping 4 ms.
- Bufferbloat test (Waveform) result: waveform. com/tools/bufferbloat?test-id=d9832008-9976-4d62-9b91-8c0728fc1b03
- Updating WLAN/Ethernet drivers on the laptop does not resolve the issue.
- The problem was also present in the previous router firmware version (1.3.5 Build 20241211).
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Hello @Platinum85 ,
Welcome to our community.
Have you tried to disable the QoS feature for comparison? Or, remove the TV box from the QoS Prioritization list, does it help?
Did you test the speed and get the result on the wireless laptop?
I can't open the Bufferbloat result screenshot. Can you provide it again?
Also, we have released a beta firmware: Enabling QoS on the Archer AX55 May Cause Latency and Buffer Bloat.
Please try installing it and test whether it helps.
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When I disable the QoS feature or remove the TV box from the QoS priority list, IPTV streaming starts buffering frequently. It’s possible that ping spikes in the game might not occur with QoS disabled, but in this case IPTV becomes unstable, so I need to keep QoS enabled.
Yes, as already mentioned in my post above, all tests (including the speed test and the Bufferbloat test) were performed on the laptop over Wi-Fi with QoS enabled.
The Bufferbloat test screenshot is attached as a file below.
I would prefer to refrain from installing the BETA firmware for now to avoid any potential additional issues with the router. I think it’s better to wait for the release of a new stable firmware version.
If additional tests need to be performed or diagnostic information needs to be provided, I am ready to do so.
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