@Zanadar Did you test it with a short cable? I have to say -70dBm is a very bad signal, and the Iperf test result is not good, it seems like the new EAP650 has some issue maybe. Have you tested in...

@Thanompon Did you check "HTTPS Redirection" with the radius portal? Keep the internet connectivity clear.

@Dan15 Use the label and see below.

@LarryGWapnitsky Controller firmware? Are you sure the internet connectivity is available?

@icosethisone Check if the power supply is stable, it's the key.

@Randy_B I have to say, based on your description, the problem still looks more likely to be in your A51. If you though it might be caused by the EAP firmware upgrade, you could back up the...