I just found this on Reddit, which I never thought to look at until
tonight! I'm just going to try it and see what happens: Smart Plug
Routines via Google Home App : googlehome (reddit.com)
I'm having the exact same problem. If the voice command is and "OR" with
the sunset time, then it's fine, but if you have to also speak a voice
command, it sort of defeats the purpose of controlling the lights at
sunset. Hope someone answers this -- ...