Planes have a Mesh Distance field exceeds the size of the original mesh

Planes have a Mesh Distance field exceeds the size of the original mesh when the value is set to 2. This behavior does not seem intended as the cube does not experience this issue when the value is also 2. This issue does not appear to be a regression.

Versions Tested: Issue occurs in all versions tested
4.16.3 - CL: 3561208
4.17.1 - CL: 3586342
4.18 - CL: 3641171

1. Create a new project (no template or starter content needed)
2. In the new project go to the project settings > Under the Rendering category > Enable the Generate Mesh Distance Fields option
3. Restart the project
4. When the project reopens Add a Cube mesh and a plane mesh to the level
5. Select the plane mesh and open it in the Static mesh viewport under LOD 0 > Build Settings > Distance Field Resolution
6. Set the Value of Distance Field Resolution to 2
7. Save the mesh and close the Static mesh editor and click yes in the pop-up window
8. In the viewport click the Show option > Visualize > Mesh Distance fields
   Result: The Plane extends outside of the mesh's original size
   Expected Result: The Mesh does not extend outside of the Mesh's original size