It doesn't snap into anything, it's just a bent metal tab which contacts the surface behind it. If you pull off your pads its very easy to see. You're right, it's definitely a bit alarming, but I hate the thought of sending these back and waiting, and they are working perfectly now. So I guess I'll keep using them and hope it doesn't happen again. If it does then they'll have to go back
I know the part you are talking about.
An idea would be to pop the driver out (just unscrew the securing plate that sits between the earpad and the physical driver, and extract the driver, minding the soldered wires behind it), and carefully use a small wrench or plier and really have a good squeeze on the metal tab, making sure it'll stay nice and tight.