I bought a Pixel 3A , running on Android 9, last week. Easy to set up and transfer stuff from my other phone, (except music, which didn't transfer). But the smart lock does not work. I have set it to work at home and it says it is a trusted place. But every time I have left it for more than half an hour, I have to use my pin to get into it. I've looked at various supposed solutions online, and none of them have worked. Any ideas please.