Ok So I have been stuck on a similar problem for 3 weeks.
I want a 'level up screen'. one where you Pick something, and then it goes back to the original layout. After making some minor modifications, to the demo I added a second layout. The goal of this layout was for the game to pause, and the user to pick a second weapon upgrade to use, and then going back to the original Layout.
I started by having a second event sheet for the upgrade page. Didn't work. I tried putting it on the original event sheet. Didn't Work. I tried having both. Didn't work. I stopped using the default OK button and made my own. Didn't Work. I downloaded the chalkboard example that is provided somewhere else here on the forums that has a single stage and a Main Menu, and the code looks exactly the same. I checked to make sure that I wasn't re-triggering the event by automatically adding 1 to the Score. I even tried removing the changes to the game time. Didn't Work.
Finally. I am posting here.
Here is a Link to my Google Drive File.
Thanks for Any Help!