Moto G4 crashing on VR

I've developed a VR application one year ago, it's working on iPhone 5 and 6, and on Android devices...

One of my clients reported that the Motorola G4 was crashing after a minute of VR.

I think some of these Android devices may have very specific problems to the engine or to the components, crashing the app after a minute of VR experience.

My app uses Google's Cardboard API for VR.

Is anyone having such a problem?

Thanks and have all a happy new year's eve!