Can't decode qrcode

[alexandrerua]

I'm not able to read this qrcode from invoices.

I get the qrcode zone from the pdf and plotted here.
I tried some resolutions and don't had any success, in the same document there are other qrcodes that pyzbar can detect.
My phone can read successfully this qrcode.

Can you give me some hints?

[ssmns]

I’m encountering the same error:
During processing of 1,000 files, Pyzbar fails to detect just one QR code among my files.
I also tried detecting it with OpenCV — but I failed again.