Hi Andy,
The RF scanner device error message is "The page cannot be displayed" with Cannot find server or DNS Error on Internet explorer, while the tablet error message is the timeout error on Chrome.
AP event history window does show the handshake to AP radio (connection completed/successful) on the iphone and desktop devices but no history of the devices that couldn't connect.
All devices are showing AP radio/WiFi as "connected", but going to google site was only successful on the 2 devices I've mentioned.