Write to [email protected] and a person will read it.
Almost always one of these:
Arriving is noticed more reliably than leaving. That's iOS, not a setting — and it's why a rule you can't end until you leave lets go on its own if we stop being sure where you are.
The fence has never once contained your phone. Usually the pin is on the wrong side of a building, or the fence is too small. Open the place, move it, or make it bigger.
Both phones need to be signed into iCloud. Invitations expire after fifteen minutes and work once, so make a fresh one if in doubt. For a rule about being somewhere together, you both need a place saved under the same name — that's how the phones match, and it's why neither has to know where the other is.
Rules can be switched off or deleted, except one that's holding — that one ends when you leave. Deleting the app removes everything it kept.