[Qt Quick 3D Physics] Customshapes example - flickering 3D elements

Qt Quick 3D Physics - Customshapes example 3D element (the blue ramp) is flickering

Steps to Reproduce:

1. Open Qt Quick 3D Physics - Customshapes example
2. Build and run it

Actual Result:

The 3D element inside this example is flickering continuously

Expected Result:

All the 3D elements get rendered without any flickering

Reproducibility: 60%