"Cast Dynamic Shadow As Masked" is not visible at Material Instance

"Cast Dynamic Shadow As Masked" is not visible at Material Instance.

There is no property in Material Instance, but it does not work even if Base property is Enable, so it seems like a bug.

1. Create Material.

2. Set Property
 - Blend mode to Translucent
 - Cast Dynamic Shadow as Masked to Enable.
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3. Texture Connect to Opacity in Material.

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4. Create Material Instance from Created the Material.

5. Masked Dynamic Shadow is not visible at Material Instance.

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I attached the project.
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Fix UE-51650

i have this problem UE4CC-Windows-58DC12AF4B97F057BD108FBFF569B2E9_0000

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