PM1115UW doesn't hold WiFi settings

I’m using Aruba InstantOn AP22 access points. I have another that I could bring up for a test, but I find it unlikely to make a difference. Do you have a known-working SSID I can use with it?

Just in case it doesn’t like the current SSID, here’s a step-by-step while trying to connect to a new one I just created called “mytest”:

Scanned for the network, clicked the appropriate radio-button to select the new SSID, entered the Network Security key (I changed nothing else - all fields auto-populated):

Screenshot from 2022-12-22 10-19-41.png

Scrolled down and clicked Save & Restart:

Screenshot from 2022-12-22 10-20-09.png

Saw this during the restart:

Screenshot from 2022-12-22 10-20-24.png

After restart the home page loads:

Screenshot from 2022-12-22 10-21-16.png

Click Wireless tab to see if it kept the settings or not:

Screenshot from 2022-12-22 10-21-37.png

As you can see, after clicking Save and Restart the wifi settings were lost and it was back in Ad-Hoc mode again.