RTL8812AE stops using 5 Ghz due to wpa_supplicant 4 way key_mgmt_offload

[jan]

On Ubuntu 20.04.1 LTS (GNU/Linux 5.4.0-53-generic x86_64)

RTL8812AE stops using 5 Ghz Wifi after a few days.
The 2.4 Ghz wifi (that was not used, but present in these days) kept working.

During reconnection, the 4-way Wifi authentication failed every time.

Usually, power down and up helps, but this did not give me additional information

I tried following, to no avail
1) stopping / restarting wifi from networkmanager
2)removing drivers, and reinstalling
sudo rmmod rtl8821ae btcoexist rtl_pci rtlwifi mac80211 cfg80211 libarc4
sudo modprobe rtl8821ae
3) restart wpa_supplicant
sudo systemctl restart wpa_supplicant.service
4) restart networkmanager
sudo service NetworkManager restart

What fixed the problem was disabling key_mgmt_offload

sudo wpa_cli
set key_mgmt_offload 0

So apparently, the WiFi board froze into a state where the 4-way Wifi authentication could not be handled on the board itself anymore

[jan (jan-ubuntu-h-i-s)]

Today, the offload doesn't help
Might is be a problem with this type of card ?

https://bbs.archlinux.org/viewtopic.php?id=239695

https://groups.google.com/forum/?_escaped_fragment_=topic/linux.debian.bugs.dist/_0FU5-1Twnk#!topic/linux.debian.bugs.dist/_0FU5-1Twnk

or with having the same SSID on 5 GHz and 2.4 GHz.
https://community.tp-link.com/en/home/forum/topic/1819

I'll try some more