A small aside: this is why I truly hate when people argue 'oh well, his only happens in 1% of cases, it's not worth supporting/solving'. With sufficient scale, and even without sufficient scale, it's thousands or even millions of people!
Agreed, that wasn't my point. I wasn't suggesting it's fine if it only affects a small number of people. More confused as to how it could slip through testing if it affects a substantial number - given how few units have likely shipped.