Just did it again. FYI, there's 2 ways it notifies me and it's weird. First is the standard location error where it says it can't find the location and you need to turn on the features that improve location accuracy. This notification stays on the lock screen until I remove it. What it's doing now, is what it does a lot of, and that's send the notification and sound, but the notification on the lock screen disappears immediately. It'll do this a couple of times, or several times in a row. Then all of a sudden it does it and the notification stays. In the time I've typed this it's done it 3 times and now the notification is still up on the screen.