I think its an error #104 I get that is similar (unknown challenge.) I think all that crap has to do with network packets (being sent and received all the time afterall.) I'm just guessing but they are in the process of drastically changing their network from the inside (lots of things going on with transitioning from wimax to lte), or possibility number two, the network complains about things a little too loudly (again, maybe over dropped packets or something of the sort.)
I really think its only a minor inconvenience with the little notification popping up and all, but I believe both our phones and our services are otherwise operating exactly as they should. In short, I just ignore it.