I had the same trouble. The spring got a funny look, a bit twisted, for a few days, and then it disappeared. I guess that's a fatigue fracture. The angular motion is maybe a bit too much for this leaf spring.
Jaime made a new spring with a coiled design.
He send me a few of them to save on the shipping costs (for me and the other European climbers if they need it, I have yet to spread the word about it).