Auto Convex collision generation doesn't work in some instances the accuracy setting

The new auto-convex collision generated (V-HACD) will not work properly with some meshes to generate accurate collision.

Using a rounded single piece mesh the accuracy setting will not work at all no matter if it's set to 1.0 or 0.0 there will be no change, only a single collision hull will be generated. (This mesh is attached and easily reproducible) Using the SM_Rock (starter content) results in multiple hulls being generated depending on accuracy that is set.

Video attached to demonstrate both.

1. Open UE4
2. Import attached mesh (SM_Rounded)
3. Open in Static Mesh Editor
4. Change to Wireframe mode to easily see generated collision
5. Use the Auto Convex collision tab and set the accuracy to 0 and hit APPLY
6. Now Use the Auto Convex Collision tab and set the accuracy to 1.0 and hit APPLY

Results: Accuracy has no effect with this type of mesh. There will only be a single collision hull generated.

Expected: Using a higher accuracy should result in more collision hulls being generated to represent a more accurate mesh shape.