Pixel phone battery and wifi not showing as unavailable

For some reason, the phone is never showing as unavailable or missing. What I expected to see is a huge gap from 12 PM to 8 PM. Instead the battery is constant/flat, around 80%, until 8PM. This is when the phone is back on the local network and battery percentage drops to the “real” value. I think it should have no value between 12 PM and 8 PM since my phone is off network and the phone has no way to access the local home assistant server.

Have I misconfigured something?