Yeah, it obviously has other connections, as it didn't come free. But for it to pop off initially, in only a year of operation, is quite surprising, and I'm sure a few Imagineers are on the hot seat because of it.
Cell phones are hurting people more and more. It's only a matter of time until Disney has to address that issue, reactively most likely. They don't even care if you film onride with your camera, which is stunning.
Had this come off at the high point and gone flying through the air like a frisbee, it could have been quite dangerous.