I believe it is a new(er) bug, as I didn't get it until I went into the AvA arena. After that, exiting back to the splash screen (choices of offline / online, etc.) and re-entering online and then mission arena, still gave me lost UDP.
Until, you get confirmation from others, it could actually be my connection (although showing between 47 to 78 ping).
My daughter has been in a tug of war with bandwidth, and I am holding off setting the hammer down, for more important issues. Sorry to say Dale, they do grow up..........