@Kibble Fat
Interesting about the short getting worse over time. Right now, it's pretty intermittent: sometimes flexing the cable shorts out the right channel, and sometimes it doesn't. Nice to know it's likely to get worse over time.
In any event, I've written to Hifiman customer service....
Good luck. I've already spoken to them multiple times. They are "unaware of any issues" and "have never heard of this issue before."