I think there would be widespread reports of these breaking if there was a problem with them. I play beach volleyball competitively every weekend and have never taken it off and it still looks great. With anything that has parts, some of them are bound to have manufacturing defects.
Yea this looks like an one-off. You see the stud / hinge (actually not a screw) that broke off, it looks slightly deformed or the bottom part is missing in this photo. With normal wearing, the force that is exerted on the buckle would be almost entirely to the direction that the hooks are holding. The poster of this photo didn't say he crashed this buckle part against something or not, but it doesn't look like any impact has happened, it is the part itself not holding up.
Regardless, I'd consider this band not being the most structurally sound, even just for this one example happening. Those parts are way too small and filmsy.