Specific barcode not recognized

I faced a problem during development that I could not scan Code39 barcode with iPad using Vision. A sample label I used for test has multiple Code39 barcode on it and I could scan almost all barcodes except for specific one.

And when I use conventional barcode scanner and free apps to scan barcode, I could scan the barcode with no problem. I failed to scan the barcode only when I use Vision function.

Has anyone faced similar situation? Do you know the cause why specific barcode could not be scanned with iPad with Vision?

Specific barcode not recognized
 
 
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