I attempted to purchase a Gentle Knight dragon. Timer still had time on it left, but when pressing the icon, it would not open up. Tried several times. Force quit Dragon Story and that did not make a difference. I restarted my device and the two special offer icons for Gentle Knight and Incognito dragon have now disappeared. Usually the timer expires 30 minutes before the end of an event and not with in excess of two hours remaining.

Rather disconcerting that the special offer ended prematurely and without warning.