I have numerous TP Link switches and plugs in my home. I have had Google Home link to my Kasa devices for over a year and it worked well.
Over the last few weeks, each time I use voice commands via Google Home to control the light - the lights turn on/off but my Google Hubs will say there was an error connecting to TP Link Kasa. If I try to use the Android Google Home app to look at a switch, it will say that it cannot connect.
I looked through the settings in the Kasa app and didn't see anything that might stand in the way. I also reconnected my TP Link Kasa account to Google Home and tried to resync (both by the in app menu and saying "ok google sync devices").
Not sure what to do and I didn't find anything by searching round. Maybe I missed something. =(