It seems to me it doesn’t work well, I noticed the barcode extracted often matches one “random” release on the page, not a specific one.
So it is very likely UPC prefilled isn’t the one of the release the user is trying to add.
Not that the UPC itself is wrong (it exists, and matches one release), but since we don’t have mean to know which release it matches, I’d rather display it on the page instead of prefilling barcode field.
What do you think?