Sector Sweep Path finding bug

It seems that there is a bug in the path finding of the Sector Sweep. I have seen it in every one of my Beta 4Z games, it may have existed previously but I did not notice. When a ship(s) is set to Sector Sweep and finds that either a resource or anomaly is in one of the corner grids, the ship(s) will not go around the obstruction. Instead it triggers a 'wrong ship type' warning message. If any other grid in its path is obstructed, the ship(s) will go around it. I only set Sector Sweep for Scouts, so I don't know if this affects other ship types.