For all the power of message sending, only the current scene is active at one time and there is (currently) no possibility of sending a message to a different scene.  Of course, that is unlikely to be your main intent, but it is easy to have a message that is sent to the current scene, or even to a Connect’d pie, and then to fall for the erroneous assumption that another scene in your pie also knows what these others know. When you implicitly make this assumption it can prove to be very challenging to uncover the flaw in your pie.

So, what should you do if you want another scene to know about events in another scene?  Variables are the solution – use ‘all scenes’ flag variables to indicate some event  and then when you jump to the relevant scene you can consult that variable and take steps to tweak the scene accordingly (and reset the flag variable in the process).