I can sympathize with the OP on this one. To me, the location-based Smart Lock never has worked very well or for very long. Same problems as the OP describes, and I think I've tried every tip and trick I've seen already listed here and everywhere else I've found via Google searches and nothing helps for very long if at all. Same problems on two different S8s, and same thing on my S10. It'll work great for a while, then just randomly stop, some days it works all day, then get up the next morning and nothing. Go to work all week, then when I get home 2-3 days a week it will start working normally when I get home, other days nothing. You go into the Smart Lock like you want to add the location, and it will pop up that you are in the exact location it already has on the trusted list. About 50% of the time it will start working after doing this, other times not. I pretty threw in the towel on the S8. Was very hopeful that it would work on the S10, but same crap on this too. Just enjoy when it works, live with it when it doesn't. Frustrating "feature" for sure.