Android presence and Smart Home Monitor problem

Possibly, phone geolocation can go bad for a lot of reasons. There are a lot of threads about mobile presence since it’s a frequent problem. This is still a good one:

If you mean arming SHM from a routine, then yes you should be able to set the routine to trigger after both your phones leave. I don’t quite understand what you’re saying though. You mean it’s arming after only one person leaves?