But, if you bring it to their notice then they have to follow procedures with it. If they fail, and then penalise you because of it you have more of a leg to stand on. It's worth doing for something like this, just to cover yourself. It's awful to get 6 months down the line and realise you are suffering extra problems because of something you didn't feel up to pursuing right at the beginning.
I do agree that about early notification to protect one's interest but not to hang our coat on they doing something.