I rolled out this firmware yesterday to my 4-router AIMESH home network (with ethernet backhaul) with about 75 devices on it. So far seems very stable. Devices include a mixture of laptops, phones, tv's, and IOT devices. Seems to be one of the better firmware releases Asus has put out lately...
21099 worked great for me. But i flashed to 22068 a few weeks ago. I finally hard reset all 4 of my xt8's today, and so far so good. No random disconnects from my iot devices like what happened after the upgrade.
It seems stupid to have to factory reset after a firmware upgrade. But it seems to...