What is happening is the AP downloads the firmware without issue, sets the next boot to secondary and restarts. The AP comes back up with 188.8.131.52 loaded, connect and all looks good for about 3-5 minutes. Then the AP suddenly reboots, fails back to the secondary 184.108.40.206 image and runs on the older code. When consoled into the AP we see no error at all, only a message stating that the AP is rebooting.
We tried updating to 220.127.116.11 and still the same issue. The VC AP takes the update just fine but the other APs keep failing back to the older 18.104.22.168 firmware. This is also the case with upgrading from the command line as well as the webUI.
Best answer by Christoph S.
Go to step A 11 or B 12 and check to make sure that the adopted ap image is on the VC, if not, load it and reboot the APs.
I hope this helps,