Interesting because it's in the side glass. Both sides?
You'd think if it was a defect in the manufacturing process, it would show up in the side glass OR the windshield, but not both as they're probably made on different lines, if not different factories
If it's BOTH sides, that suggests a defect, as does the paint being ok. It could have been someone running a leaf blower say, but that would have caught the paint too and probably not got both sides