Events + Registering Blank Users

I’ve setup a site using the Membership 2, Events + and BuddyPress plugins. For the most part everything’s working well except for a few select users. The problem is when people are registering it’s telling them that they’ve registered successfully but then it’s showing blank info in the Event RSVP’s or they’re not actually registered. From what I can tell it seems to be only one user with blank info since it’s only showing once each event.

I’ve tried searching for a fix but haven’t been able to find anyone with this same problem. Any idea why this is happening?