@TWH3,

Are you sure that all of these devices have been configured in the Kasa App all the way to completion? Are the devices controlled via the Kasa app when your phone is connected to both your Wi-Fi and when connected to your cellular connection?

After the setup finishes, the devices should disable their setup networks and connect to your home network's Wi-Fi, and the LED color should change. 

The plugs will stop broadcasting after 15 minutes by default, but this is only meant for when the devices sit plugged in and are not configured.

Since you mentioned they are functional, I would try checking for a firmware update to the devices.