Strava Beacon has never worked for me on my Garmin Forerunner 245. Even when I start the LiveTrack manually it kicks off a Garmin email but never initiates the Strava beacon. I have disabled, re-enabled etc. but still no luck.
On the LiveTrack note, even my Garmin LiveTrack doesn't kick off if I have a course loaded. If no course then the LiveTrack starts automatically like it should, but with course loaded (happens on both running and biking), it just forgets to start. I have to go into the app and manually start it. Seems like one of many bugs.