Also if you set up your Google Assistant commands to run as routines in the Google Home app Google assistant won't reply with anything. I have set all my commands to run as routines to avoid having to hear google verbally confirm after every command.
After setting it up I spent hours trying to figure out why sometimes Google would run my command silently and other times I would get an annoying reply, "Ok, turning on the bedroom light" for example. I finally realized that I had set my routine up with a command like "Turn on the bedroom light" but I would sometimes unknowingly speak it reversed "Turn the bedroom light on" and Google would just run the standard command and not my routine. Setting up the routine with two commands, stated both ways, fixed the problem.