Second inspection of the strap the spring mechanism has popped out and failed
Yes, but, did it actually fail, or did the OP just not check it? I can’t see how once it’s clicked into the ratchet wheel the spring could pop off?
And there’s 2 ratchets normally, one in the body that holds it in position, and one in the lever that rotates the cylinder, so even if one did somehow fail, the other should still hold it IF you tie a knot over it.
Unless somehow both pawls failed between when the OP (presumably) thoroughly checking it before setting off and the corner, then unless the manufacturer is feeling charitable they’ll just say it’s the OP’s fault for not checking it before setting off (still not sure until the OP shows us a pic how the pawl comes/came out once it’s under tension?) and that he should have tied a couple of half hitches over the body of the ratchet to stop it opening (and thus unwinding) even if the main pawl/ratchet somehow failed.