Since there are at least 3 of us with the exact same issue, I wonder if it's time we took it to reddit/Facebook/other social media. Seems like a clear manufacturing defect. Maybe it's been resolved but without posting here, I never would have known about it.
Well I tried to make a fuss but it seems I was drowned out by all the deservedly good reviews of the z1r.
For me, my initial annoyance was assuaged by my making the https://ier-z1r.com website.
I'm feeling content now because these iems are very good, I got a good price, fixed the issue and third party cables are better imo.
But yeah, as long as we don't libel Sony I'm happy to be on the "cable manufacturing defect" bandwagon.
These are expensive iems for the majority of people - please feel free to use my website if it helps as a focal point as everything stated therein is true and therefore not libellous.