EP10 smart plug connects to wifi but fails setup
I have 3 EP10 smart plugs and one has failed to complete setup multiple times at the last setup step. The setup process at the "Unable to Connect Your Smart Plug to Wi-Fi" despite it actually being successfully connected. I can see the device is on the network and is assigned an ip address. The physical indicator on the plug is solid orange. For some reason the app is failing to fully setup the device.
I have tried:
1. Resetting the plug according to https://www.tp-link.com/us/support/faq/2648/
2. Uninstalling the app, reinstalling, and trying setup again
3. Restarting phone and re-attempting
4. Trying to setup from another phone (iphone 12 pro max and iphone 8plus)
5. Restarting Access Point and Router
6. Changing the 2.4GHz channel (11->6->1)
I have also checked that my security settings are set to WPA2 on the 2.4GHz radio and that the channel (6) + width (20) are acceptable. As the other two are connected successfully are there any other troubleshooting steps available before I submit for a warranty replacement?