I just came across this. This exact thing happened to my 5000 and 2000 Chosera stones within the first six months of buying them. I bought them back in 2012 I think. I’d given up on them, thinking it was a design flaw. I’ve considered ordering new ones from time to time, but have always been nervous it’d happen again, and they are very expensive.
So, has this issue been fixed? Is Tom still active here?