I am having exactly the same issue. This is the fourth time this has happened to me in the past 2 years.  I have discovered a pattern: every time when ANZ updates its online app, BANG communication with QB stops or stuffs up.   The fault lies with ANZ, not with QB.  But for some annoying reason, ANZ expects QB engineers to fix it by referring you to them.  I suggest you do the same as I have done, and lodge a formal complaint with ANZ.  You will be fobbed off by some standard response and have your “case referred to some management team”.   I am seriously considering switching banks.  But yes, frustratingly you can only sit back, wait and keep your fingers crossed that this will be fixed soon.