Flutter QR Code Scanner not starting preview when view pushed [qr_code_scanner]

Iam trying to push to the QR code scanner screen, with the following code, and when I push it I can only see a black screen (black preview), and I have to pause and start the camera manually, to actually see the camera picture (preview).

Push:

Navigator.pushReplacement(
        context,
        MaterialPageRoute(
          // Material page route makes it
          builder: (context) {
            return qrScreen.QRViewApp();
          },
        ),
      );

The qr reader code: I am using this example

And I am using the following dependency: qr_code_scanner: ^0.5.2

LOG: LOG Link (PASTEBIN)