Has any one else been having there big angel sigh disappear earlier then supposed too? It has happened to me twice so far since this new patch came out where I would pop one after siege to go on runs then log off for the night. But when I logged back in it has disappeared well before siege prep has even started. I have asked in world and have gotten mixed responses some saying yes some saying no.
A person in my guild was reporting the same thing a week or so ago, exactly as you describe.
Unfortunately thats 2nd hand information coming from me, so all I can say is that this is not the first I am hearing of big angel sigh's disappearing LONG before their designated expiration period.