onSurface=true overwrites TELEPORTTO maxradius in Y

- teleportto{location=@RandomLocationsNearCaster{amount=1;maxradius=8;minr=6;onSurface=true}} @Self ~onTimer:20 ?playerwithin{d=8}

Doing onSurface=true seems to override the maxradius y value. I had my boss teleport outside the dungeon because it teleported 40+ blocks down to the surface outside the dungeon. Even thought in X and Z coords it was within 8 blocks, it very much was not that way in the Y axis.