The same exact thing happened to me, I just got rid of the stove, it wasn't worth fighting the company for a warranty problem imo, I also had issues with the secondary reburn tube mounts, when I went to pull the baffle board out I had to take the first two tubes out, the screws that hold the mounting clips just sheered off, had to redrill and tape new holes, it was a huge pain just to clean the chimney out.
Lesson learned, never buy a stove from China, yes the stove provided good heat, decent burn times but the rest was not worth it, I also vented my frustration about the stove cracking in the door corners here and there was a US stove rep that was just a pompous jerk that replied, I lost faith with the company (especially when you see how BK handles there customer issues) that's why I said it wasn't worth fighting the warranty problem.