Hi hnyman,
Yes, as I have found out... see my post OpenWRT 21.02.1: WPA3 Support not working?. Fortunately with the mentioned reddit-hack I was able to make WLAN working on 5GHz and 2.4GHz using WPA2. It has been stable for the last 16h 
and as James wrote in a replay to my post, help in the form of OpenWrt 21.02.2 may be within reach.