All challenges and bonus games don't always reach every single player and unfortunately we have no control over who does receive them.
At times these live event games are only available within certain countries, or to a certain group of players or indeed to players connected via a certain platform.
Technical issues may also prevent you from seeing the challenge or may cause that they disappear before the time has expired.
The game studio can also be testing new features in the live event and therefore it is available only for a limited amount randomly chosen players.
If a certain feature do not appear in your game, all you can do is to make sure the app i updated and that the game is connected to your King och Facebook account.