fix models.Player.last_location

app/models.py

@@ -148,7 +148,7 @@ class Player(UserMixin, db.Model):
         if not self.locations:
             return None
         if game is None:
-            return max(location for location in self.locations)
+            return max((location for location in self.locations), key=lambda location: location.timestamp)
         game_start = game.start_time or datetime.min
         game_end = game.end_time or datetime.max
         return max((location for location in self.locations if location.timestamp > game_start and location.timestamp < game_end),