Can’t say that I am surprised, China has a long history of doing whatever they want and figuring that nobody will stop them.
Once in awhile they get the knock-off right, I’ve been told that the low-speed drills that Harbor Freight is selling are the old Black & Decker ones, the kind that when you let off the trigger it will still make a couple revs and take you with it if it’s stuck. But most of the time they butcher it. I’ve broke three 3/8” breaker bars from HF and never had a cheater pipe on it. My 1/2” Craftsman I not only had a long cheater pipe on, but jumped up and down on the end of the cheater. It didn’t care. It’s not all that much beefier, but IIRC it was made in the USA instead of China....