Google Cardboard for Unity renders only one light source

I downloaded Google Cardboard SDK for Unity. In the demo scene, I put 2 light sources (spot with default settings). As you can see in

, the two light sources are rendered in unity editor and game mode, but only one light source is rendered on my Android 5.1.1 phone.

Is the “one light source max” a Cardboard limitation I am not aware of? Or am I doing something wrong?

Thank you for your help!

I found the answer: