@Luke0 

If Google could not control tapo devices properly, please try some suggestions here: 

What should I do if I cannot control my Tapo smart devices (smart plug, smart camera, smart lighting)?

Can you help provide some details here to help exclude the issue, thank you

• Can you control the device locally (same network) from the Tapo app? 
• Can you control the device remotely (LTE or different network) from the Tapo App when Google reports error?   
• Any error message you receive from Google home app, please share a photo
• What Google did say to a voice command and exact time when the issue occurs :   e.g. 9:00AM,  ' Google, turn XX bulb on' , Google responds ' ...

Please also share the MAC address of bulb with us via private message, thank you

Thank you