Shrub Area Boundary Facing Inward or Inverted
Issue
One or more of your Shrub Area boundaries are facing inward, or are inverted.
Cause
The polyline making up the Shrub Area outline was either drawn in an incorrect direction (counterclockwise instead of clockwise) or was reversed at some point.
Solution
For any Shrub Area borders that are facing the wrong way (inward instead of outward, for example), select the polyline boundary, then right-click it. From the menu that opens, select the Reverse option.
The boundary should now be facing the correct way.