Steps to reproduce:
1. Create a new Unity 3D project
2. Import attached Unitypackage
3. Open "Demo" scene
4. Press play
5. Try to move the ball behind red obstacles using WASD keys
6. Notice how red obstacles become transparent ("editor.gif" attached)
7. Exit play mode
8. Build and Run on Windows
9. Repeat step no. 5
10. Notice how red obstacles don't become transparent ("player.gif" attached)

Expected behavior: red obstacles get transparent like in Editor

Reproduced with: 5.3.6p2, 5.4.0f3, 5.5.0a5