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Hello Munster, I have found that you don't have to log out/in to fix the unresponsive Event button all you need to do is play another level
Also just returning to the home page (Play button) of the game and pressing Play makes the Event button work again.
It has been this way for over a week for me.
Unfortunately this issue seems to be getting mixed up with another issue that causes people's game to freeze at the end of a level