Laggy Wi-Fi on desktop

I’ve been experiencing issues lately with wifi on Fedora 32 Workstation. It is installed on my desktop which has an Intel AX200 adapter. I can’t pinpoint what was the exact moment, but maybe a month ago I started noticing significant delays when loading webpages for example. And it only got worse since then. My laptop is working fine (I am using it to write this) on Elementary OS, but it’s connected to the 2.4Ghz frequency as opposed to the 5Ghz on my desktop. However I don’t think that the frequency is the cause here since neither are working on my desktop. It all began as occasional, random increases in loading times, but now I’ve reached the almost unusable levels.

I’ve tried the following:

Running journalctl -f, the only significant reports are:

  • iwlwifi [...]: Queue 3 is stuck 73 190
  • Microcode SW error detected. Restarting 0x0

lspci's relevant report is Network controller: Intel Corporation Wi-Fi 6 AX200 (rev 1a)

Thanks in advance for your help!

This chip is fairly new and the situation goes better with every kernel\firmware update.
But still, in some cases, it’s hardly usable.
I have a lot of problems with this chip.

  • 2,4 with channel width 40 = SW error
  • some routers advertising combined AP 2,4 and 5 altogether on one SSID = SW error
  • some Bluetooth devices connected and 2,4 = no errors but extremely laggy.
  • some routers and 5 = no errors but extremely laggy.
    Anyway, it’s far better than Broadcom chips eg.

Please provide router family and try to check other routers, could be the first step to identify root cause.