# AP6-Pro - Throughput + Packet Loss issues

**URL:** <https://forum.alta.inc/t/ap6-pro-throughput-packet-loss-issues/7043>\
**Category:** Access Points\
**Created:** [September 30, 2026, 8:25pm UTC](https://forum.alta.inc/t/ap6-pro-throughput-packet-loss-issues/7043 "2026-09-30T20:25:21Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![michaelmurfy](https://forum.alta.inc/letter_avatar_proxy/v4/letter/m/bb73d2/32.png) [@michaelmurfy](https://forum.alta.inc/u/michaelmurfy)\
**Post date:** [September 30, 2026, 8:25pm UTC](https://forum.alta.inc/t/ap6-pro-throughput-packet-loss-issues/7043/1 "2026-09-30T20:25:21Z")

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Doing this as a new thread as I am not 100% sure if this is related to AP Firmware 2.4n, but it seems to be the culprit.

I’m having major issues with my AP6-Pro’s right now. Normally my WiFi can sustain Gigabit speeds absolutely no problems but it seems since Firmware 2.4n I’ve got issues sustaining anything over 20Mbit plus while I do I get a huge amount of packet loss. I have done full access point factory resets, isolated the network by disabling everything and creating a new SSID and default settings etc with no success.

I can somewhat mitigate this if I set the 5GHz channel width to 20MHz - the packet loss seems to mostly stop (unless if I am absolutely smashing the radio) and the network goes in a usable state again but then somebody firing up a stream is enough to kill a teams call.

Doing some real digging on the AP itself via SSH it appears that despite the client associating to a HE80 BSS it is installed in the driver as IEEE80211\_MODE\_11AXA\_HE40 - it seems most clients phymode is forced to HE40.

If I kick a client from the access point using cfg80211tool the driver will then use IEEE80211\_MODE\_11AXA\_HE80 and speeds go back to normal (~900Mbit) but on a normal client reassociation we’re back to HE40 and terrible speeds once again indicating a potential driver bug.

Clients are mostly Apple - the main clients I used for testing in this case was a M3 MacBook Pro as well as an iPhone 17 Pro Max.

Happy to provide any logs or provide access for further investigation but think I have tried pretty much everything here. It is a smaller home network with just 3 access points. If I could downgrade AP firmware as a test that’ll be something worth trying to just isolate this firmware as being the potential cause.

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**Author:** ![Alta-Jeff](https://forum.alta.inc/user_avatar/forum.alta.inc/alta-jeff/32/56_2.png) [@Alta-Jeff](https://forum.alta.inc/u/Alta-Jeff)\
**Post date:** [September 30, 2026, 9:53pm UTC](https://forum.alta.inc/t/ap6-pro-throughput-packet-loss-issues/7043/2 "2026-09-30T21:53:13Z")

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Definitely not seeing anything like that in any of our test sites, nor production sites.

Feel free to invite me, and I can downgrade the firmware temporarily to see if there was a regression introduced.

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**Author:** ![michaelmurfy](https://forum.alta.inc/letter_avatar_proxy/v4/letter/m/bb73d2/32.png) [@michaelmurfy](https://forum.alta.inc/u/michaelmurfy)\
**Post date:** [October 23, 2026, 9:22am UTC](https://forum.alta.inc/t/ap6-pro-throughput-packet-loss-issues/7043/3 "2026-10-23T09:22:56Z")

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Cheers to @Alta-Jeff for helping me diagnose this.

Still not sure exactly what was causing this, but appeared it was caused by something in the stable branch of 2.4n, a RC release didn’t have the issue. I also suspect I had an odd edge case.

Happy to say I’ve been unable to replicate this issue on 2.4o. Thanks!