VoronDesign

Disclaimer: I'm not a 3dprinter guy. I want to be, but I never found the time beyond a partially assembled prusa mendel i3.

....however, I have done an extensive amount of wiring, in various environments, a lot of it on moving parts, and what I can say is that wires of these gauges don't break like this just from movement along that cable chain (or whatever it's called), unless it's incredibly cold environment and/or incredibly cheap wiring.

I'm thinking that you're most likely correct in that it has been pinched.

I had the same issue after about a year of use. To fix it, I ran the temporary heater power cables alongside the reverse-bowden tube until my replacement wires came in. Learned along the way that the wire size I had been using for a Pharos Rapido was insufficient despite being the recommended size in the docs for standard heaters.