NGUI, which already has instructions on what to eliminate for this on their forums, and the only other one is 2Dtoolkit, which I'm posting on their forums right now. Despite that, I searched for any WWW calls or anything related to web-connection in their scripts and haven't found anything, so doubtful it's that.
Additionally, I have a second project that only uses PlayMaker and NGUI, and despite doing all of the above, it still has this behavior as well.
Thank you for your reply! I appreciate it if you can think of anything else. I'll post back here if I discover something from 2dtk.