When using command BIS_fnc_findSafePos, it is resulting in mostly shore positions.

For example, using below example:
_spawnPos2 = [_spawnPos select 0, 1,500,0.1,0,0,0] call BIS_fnc_findSafePos;
I would expect it to choose any position within 500 meters of center, but it mostly picks the edge of the map/islands. I would like to see it pick more random locations within the forests for spawning units/gear etc..