I am having the same issue. The Lutron caseta switches all work when controlled by the Google Home app but only certain lights assigned to each room will respond to verbal commands, aimed at controlling the entire room, via Google Assistant. When I create a custom voice command to turn on or turn off all switches assigned to a particular room, that voice command works. Google assistant users never had to do this in the past, as it requires the creation of many custom commands. I assume this is an issue with Google Home/Google Assistant and not Lutron as it has just recently been a problem. Is Lutron support able to report this to Google on our behalf?