Enable Impact Damage does not seem to work

In the Destructible Editor, the Enable Impact Damage flag does not seem to work. With it disabled, the destructible will still fracture when it collides with another object. Other impact settings, such as Impact Damage or Resistance, will have an effect however.

This was tested with shooting the destructible, dropping it, and swinging another mesh into it.

1. Launch UE4Editor.exe QAGame.
2. Drag SM_Destructible_DM into the level, and raise it above the floor.
3. Open the mesh in the destructible mesh editor.
4. Uncheck Enable Impact Damage.
5. Back in the viewport, check Simulate Physics.
6. Play in viewport.

RESULT:

Mesh will fracture on impact.