Some issues reading som kind of QR codes with low contrast

[apimio]

Guys ..please ..I have a very big issue. I have some years using the library, working perfectly with it, but now I have a issue with some kind of QR codes. The size of each QR code is about 8x8 cms., but the contrast is lower (some examples attached). The librery is not reading some QR codes.
I'd change some config parameter (even I tried useBarCodeDetectorIfSupported not official options). This my current code

const aformatsToSupport = [
   Html5QrcodeSupportedFormats.QR_CODE,
];

const html5QrCode = new Html5Qrcode("qr-reader", { formatsToSupport: aformatsToSupport, 
               experimentalFeatures: { useBarCodeDetectorIfSupported: true } 
            }
);
const qrCodeSuccessCallback = (decodedText, decodedResult) => {
                                //console.log(`Leimos`, decodedText);
                                //console.log(`Resultado`, decodedResult);                               
 };

var ActiveCamera = function(btn) {
                                var config = { fps: 500, qrbox: 250, formatsToSupport: aformatsToSupport, experimentalFeatures: { useBarCodeDetectorIfSupported: true} };
                                
                                // back camera
                                html5QrCode.start({ facingMode: "environment" }, config, qrCodeSuccessCallback);
                                
 }

If I read any other QR code from a site, QR app generator , I don´t have any problem.

Thanks a Lot for your help!!!!