Nothing that I can see now, but that does make sense as to how they were retained. They definitely didn't come apart this easily before. Will have a hunt and see if I can find the hub spec.
Mavics used to do that after a while. You could take them off and do whatever and then all of a sudden you couldn’t and the caps would fall out as soon as you look at them. Later ones are fine.
Nothing that I can see now, but that does make sense as to how they were retained. They definitely didn't come apart this easily before. Will have a hunt and see if I can find the hub spec.