I have a house full of TP-Link devices. Between cameras, routers and numerous light switches it's over 40 nodes. Two of my many HS210 light switches in particular have been problematic over the years in not reporting their actual on/off status back to the Kasa or Tapo app. I can control both the HS210s via the physical switch or the app but the app is often out of sync with the ON state of the switch, ie the app reports the switch as off while it's actually on. I have over 20 light switches installed, many of them also HS210s but only these two are creating this problem. I have replaced the physical switches with new ones but the problem persists in just these two locations. Both are very close to the WiFi router and have excellent signal strength. If the switch is off and I use the app to switch it on, the switch responds immediately and the icon will initially show the light as on before returning to an off state while the actual light is on. 

This is unique to just these two switches, make any sense?

Thanks

Andrew