ZXing JS fails to decode many simple and clear QR codes that are decoded successfully by ZXing for Java

[a-student]

Describe the bug

ZXing JS fails to decode many simple and clear QR codes that are decoded successfully by ZXing for Java.

I am using zxing-js as shown in the example on the project's main page.

The live preview also fails to decode these QR codes:

To Reproduce

1. Go to the live preview https://zxing-js.github.io/library/examples/multi-image/
2. Replace the img src with one of the QR codes provided below.
3. Click Decode.
4. Observe that ZXing JS fails to decode it.
5. Check that the QR code is successfully decoded by ZXing Java https://zxing.org/w/decode.jspx

Problematic QR codes

ffffffffffffff

Data URL for convenience:

data:image/png;base64,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

kkkkkkkkkkk

Data URL for convenience:

data:image/png;base64,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

Expected behavior

ZXing JS should successfully decode these QR codes, as they are simple and clear QR codes and are decoded successfully by ZXing for Java.

Screenshots

Desktop

• OS: [Windows 11]
• Browser: [Chrome]
• Version 151.0.7922.109 (Official Build) (64-bit)

Additional context

You can find many more examples using qrcode.expert. Expand the Scannability Report to view the scan results from different QR-code readers/tools. (The downloaded PNG image is not exactly the same as the one sent to ZXing JS).
This suggests that the issue may not be limited to the examples provided above.