I thoroughly exmanined the cordage last nite. It's very obvious that it was cut. IG and I checked out the Petzl swivel and I pointed out to him the sharp edges on the black part. I am certain that's what cut the cord. Looking at the bridge under a 10X magnifying glass, you can see clean cut fibers. It should have been visible to the naked eye.
Also, it's a case of the wrong fiber for the application. Technora will abrade itself when the fibers rub together. While extracting the tapered filler, fiber particles were coming out, and the inner fibers were very badly abraded. All the urethane coating had worn off. Technora has poor flex fatigue as well.
This pic is of the removed (cut) bridge with the inner buried fibers. It's pretty noticible how clean cut it is. There were only 2 pulled strands. The rest were completely cut or partially cut.