@DEcosse 

As far as I could tell, there isn't  known cloud issue recently, can you help provide some case details here to help us locate the issue:  

•  the model of Wi-Fi router and network topology, like ISP XX _- router archer C7 <wireless>HS200
• How long the kasa switches has been working with the same router. Did you recently update router firmware or change router settings before the issue started? 
• Does kasa connect to the router directly or through an extender or mesh system? 
• Can you share the Mac address of smart device which has the problem to us via private message?

For ' local only' error, you could try some suggestions here 

• Reboot kasa device when device becomes local only
• Change router's DNS to 8.8.8.8/ 8.8.4.4
• Check router firewall log/ settings, and see if any tplink domain or related request has been blocked by router. 
• Make sure device is connected to router directly, not through other AP or Range extenders
• Make sure kasa firmware  Kasa APP version are both up to date 
• Check if there is any Advanced settings on router like access control/ parental control/ Mac Filtering /Band steering/ IP optimization settings may affect the smart device

Thank you