Scan capturing unexpected characters

[Daisy_Ramirez]

I have a client who’s using phones to capture barcode and for the most part it works great. Once in a while they receive unexpected data. For example, the physical barcode says -7400123 but the scan reads 7400128.

The issue is not from one or even two devices. They have drivers across the country and its pretty sporadic.

Has anyone seen something like this? How did you resolve?

A million thanks