Vuforia SDK Version: Unity 6-2-10 -

Description with steps to reproduce: I'm building an Android AR app with Cardboard support.
Everything was working fine until my AR camera started rendering some black squares on top of my 3D model.
Is this an AR issue or a configuration issue?
I have removed shadows and it works well on Unity but in my build it's always showing this.

https://www.dropbox.com/s/qjbainr1xefmbst/IMG_1299.JPG?dl=0

https://www.dropbox.com/s/5zd5zacbi3j2czt/IMG_1300.JPG?dl=0

https://www.dropbox.com/s/jozsj3xuvpmrofe/IMG_1301.JPG?dl=0 -

Development OS (Mac OS X, Windows, Linux): Android -

Mobile OS and Version: 5.0 Lollipop -

Mobile Device Manufacturer and Model name: Galaxy S7 -

Do the Vuforia Sample Applications show the same behavior?: No,