Our church has installed tw0 TP-Link HS200 Smart WiFI Light Switches and one HS103 Smart Plug.  We have not had any problem with the HS200 switches, but the HS103 plug  is constantly changing from working to  "Device Unreachable" as indicated by the Kasa app.  We have found that if the Kasa app is connected to the church LAN, we have never observed the "Device Unreachable" state, but If the Kasa app is remotely connected, for example through a cellular connection, the plug will be shown as working or "Device Unreachable" from time to time.

When two cell phones are observed side by side with one connected to the church LAN and the other through the cellular network, the one on the church LAN will show the smart plug connected and the one connected through the cellular network might indicate the "Device Unreachable" state.

Is there an issue with the Kasa app showing the correct connection state of the HS103 Smart Plug when remotely connected?