OH, didn't think of that!I had the same issue, But only when the drone was under cover(and on) and could not get a GPS signal.
The phone and the bird had to be where they could lock on the GPS. Then the Goggle maps would work.
Google maps was showing the location fine at the same time when the S2 app was blank map.If you have a Beacon, page 5 of the Beacon manual tells you how to tell if you have sufficient GPS.
Might be interesting to compare how many satellites your phone detects and compare that to the "ring" count reported by the beacon.