Painted Landscapes have blacked out sections when deployed to a mobile device

If a user uses a multi layered material to pain a landscape and then deploys this project to an iPhone 6 plus our an Android Samsung Galaxy Note3 (SM-N9005) parts of the landscape will appear to be solid black.

Additional User URL:
https://answers.unrealengine.com/questions/197635/46-to-47-rendering-issues-on-ios.html

1. Download Attached project
2. Open Project
3. Launch on to an iPhone 6 Plus
4. Navigate the character so that the whole landscape can be seen
5. Notice there are black sections in the landscape (No black was used)

Landscape Chunks Black with 4.7 on Mobile