a crack at the top / seat tube junction and now a snapped chainstay! I really hope your issues are an anomaly and are addressed quickly. I washed and checked mine over the weekend and so far its fine, but interested to hear how your chainstay snapped and how your warranty claim goes with Airwolf.
Took a long while to hear back to be honest and i gave up. I emailed the seller on Aliexpress who are Airwofl directly. Then i had to email someone from Yaoflying. I didn't hear back for 5 weeks and kept messaging the seller intermittently to let them know I hadn't heard back. I did eventually get a reply from Beatrice at Yaoflying which was on the 20th December (so about 2.5 months later-ish).
They asked I send the frame back for inpection. As often with these items, the return shipping, and namely hassle, outweighs the warranty benefit. So i just scrapped the frame.
I am waiting for my Koga World-traveller to finish being built and this was a project to have fun with in the meantime for a few months. I'll probably move the components over another time with an ICAN frame or similar.