No other extenders on the network. The RE300 has been removed now. I have noticed issues logging in to the RE550 from the Tether app - it seems to take a few tries sometimes, but loading via the IP...

Just as i posted that, i did one more refresh on the tether app, and its popped up again lol

Tether app ios version 3.4.44 TL-WPA7517 F/w 1.0 200219 42665n (6985/8575) Since rebooting the 7517, it does not popup in the tether app anymore

@Kevin_Z just noticed tonight that the powerline WPA7517 has started showing up in the tether app, but it will not connect

Please consider adding the TL-WPA7510 KIT to the Tether app. It would be useful in my scenario where I have an Archer A7, RE550, RE300 & TL-WPA7510 KIT on the same network so i could see them all in...

Thanks :)