That's a legit possibility. Or maybe it had a small tack that didn't hold.
Without a weld I honestly don't know how its held on as long as it has! Perhaps the bouncing forces from riding rough terrain gets distributed to other points (or, perhaps that is why the recommended weight capacity for the luggage is so low). But when lifting the bike from a drop this connections has to take roughly 1/3 of the force, depending on your hand-placement, angle of pull, and a bunch of other physics jargon.
I don't think I will be ordering from CSC, but out of curiosity I looked and I can't seem to find it on CSC when I search through the different OEM Body parts. Perhaps its considered part of the entire frame since it should be fixed to it?
https://store.cscmotorcycles.com/OEM...-BAR-s/174.htm