I recently replaced my Deco M4Rs with XE75 Pros and noticed that randomly, certain iOS devices encounter difficulty connecting to the XE75 units. iOS reports 'Incorrect Password for <SSID>'. A reboot

So I bought an AC2800 but here's a strange one. The WiFi password on the bottom of the router and also on the enclosed card doesn't work. I've even reset the router a couple of times but still it won'