Well since you wanted to get all technical and missed the whole point of the post i'll tell you this much,
What was introduced to the game makes it a ERROR which then introduces the FAULT (which is the CORRECT terminology) and that FAULT actually causes the FAILURE, which is what's happening in this update so to recap, you need the ERROR first to cause the FAULT which then causes the FAILURE!
Definition of bug (FAULT) just for the hell of it and as to why i stand by my "is not a BUG" statement,
Definition
: an UNEXPECTED, defect, FAULT, flaw, or imperfection.
Soas you can see no "bug" as this was EXPECTED and laid out on the change-log so again it was NO SURPRISE and EXPECTED so we can't define it as a bug (FAULT). the things one can learn by reading it's amazing i tell ya!!