Hakka 1's sidewall problems

[Steve Sherman]

Just to set the right mood for this, we (I and my wife) have used
studded Hakka 1's (and 10's if I recall correctly) for 3-4 years now;
and love them.  The best snow/ice tires I have ever used.

Two weeks ago the RF Hakka 1 blew out unexpectedly.  Totally flat within
a few dozen feet (going about 40mph).  No obvious signs of damage except
a clean radial split on the sidewall.  A few years ago we also had
another 1 that had a sidewall leak, with no apparent physical damage.
Not a big deal except when you throw in the following...

A few weeks earlier when I was getting my set of Hakka 1's at the tire
shop, I chatted with another Q owner who was in because one of his 1's
had a sidewall bubble.  No signs of  "curb" damage or anything else.  He
told me that this was the second time he had been in to replace a Hakka
1 this season because of sidewall bubble, that appeared to be due to
manufacturing defects.

I am just curious if the members of this forum have seen an unusually
large number of sidewall failures on these tires???