Cubemap does not render on Xbox One Consoles.

Summary: Cubemap does not render on Xbox One Consoles in v1.13.0.

Impact: Sky does not change to custom sky.

Repro Steps: Create a world instance from the 'Cupcakes & Rainbows' Template 1.0.1 from the Marketplace.
Ensure 'Beautiful Skies' enabled on Xbox One.

Observed Results: Sky is default. Stars, sun and moon can be seen.

Expected Results: Sky should be purple and sun and moon should be hidden by Cubemap.

Screenshots attached: Yes

Notes: Cubemap/Skybox is displayed on Windows 10 and iOS iPad with 'Beautiful Skies' enabled.
We had changed the sun and moon anyway, in case the cubemap was not displayed.