On the 3 Points map, we were getting the arrow that indicates a player off the map, but no one was off the map yet. As soon as a player goes into the sector on the edge, it shows the arrow, even though the player is still inside the map.
In our example, the we were in sector 14.2. The edge of the map goes through the middle of sector 15.2. Every time a player crossed from 14.2 to 15.2, the big arrow showed up.