Can't open front camera while using ARCore with the back camera on some devices

I'm developing an Open Source App to play around with ARCore. In it I use the following code to display video being capture from the front facing camera on a plane placed in the environment of the user in AR.

 public class MirrorController : MonoBehaviour
 {
     private WebCamTexture webCamTexture;
 
     public void Play()
     {
         if (webCamTexture == null)
         {
             WebCamDevice[] devices = WebCamTexture.devices;
             foreach (WebCamDevice device in devices)
             {
                 if (device.isFrontFacing)
                 {
 
                     webCamTexture = new WebCamTexture(device.name);
 
                     GetComponent<Renderer>().material.mainTexture = webCamTexture;
                     webCamTexture.Play();
                     break;
                 }
             }
         }
     }
 }

This worked fine when I tested it on a Pixel 2, but when I tried the app on a Samsung Galaxy S8, I got the following warning in the log:

W/CameraBase: An error occurred while connecting to camera 1: Status(-8): '8: connectHelper:1647: Too many cameras already open, cannot open camera "1"'

It seems to be raised when calling webCamTexture.Play().

I couldn't find anything about this error on the internet. I find it especially weird, because the S8's camera app has a feature where you can take a picture using both cameras at the same time.

Does anyone know how this could be resolved?