Pretty sure this is just a bug with the mf9 update.
Some think it had to do with wifi, though I would get it with wifi turned off.
I think the general concensus is nobody knows what's causing it exactly, from what I could find.
If you're rooted you can freeze the notifier app. I haven't noticed any effects from freezing or leaving it running.
I'm on Sprint, not sure if everyone has the bug but it does appear Sprint users with the Mf9 update do.
Posted via Android Central App