Latest 3.20210608.0ubuntu0.21.04.1 update in hirsute makes iwlwifi restarting in a loop

To report this bug, I have downgraded to 3.20210216.0ubuntu0.21.04.1.

After upgrading to latest security update of intel-microcode, my wifi reception is cut every second and restart with:

juin 10 09:32:55 casanier wpa_supplicant[2158]: wlp3s0: CTRL-EVENT-REGDOM-CHANGE init=DRIVER type=WORLD
juin 10 09:32:55 casanier wpa_supplicant[2158]: wlp3s0: CTRL-EVENT-SIGNAL-CHANGE above=1 signal=-58 noise=9999 txrate=300000
juin 10 09:32:56 casanier kernel: iwlwifi 0000:03:00.0: Microcode SW error detected. Restarting 0x2000000.
juin 10 09:32:56 casanier kernel: iwlwifi 0000:03:00.0: Start IWL Error Log Dump:
juin 10 09:32:56 casanier kernel: iwlwifi 0000:03:00.0: Status: 0x00000040, count: 6

The network connection is thus unusable. Downgrading will stop showing the previous error in the journal.

I have attached the whole log corresponding to this error. It’s restarting every second approximately.

ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: intel-microcode 3.20210216.0ubuntu0.21.04.1
ProcVersionSignature: Ubuntu 5.11.0-18.19-generic 5.11.17
Uname: Linux 5.11.0-18-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu65.1
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Thu Jun 10 09:46:59 2021
InstallationDate: Installed on 2020-04-24 (411 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: intel-microcode
UpgradeStatus: No upgrade log present (probably fresh install)