I have a very strange issue I will describe and provide repro case: I use OnMouseDown rather than OnChange as the touchscreen interface I have does strange things with OnChange. I can repro this issue with a single button in a brand new layout as follows: 1. Create new layout 2. create new button, select toggle mode 3. Use following PangoScript Code: OnMouseDown: if(value<0.5) goto StartAction StopCue 1,1 exit StartAction: StartCue 1,1 exit It would appear that whenever you: a) change from edit to play mode b) right-click the layout tab in the universe c) open the universe with this layout selected The cue will be started without the button being clicked. If I change OnMouseDown to OnChange, the behavior doesn't occur. Thoughts?? Attached is a layout. Rename and drop the .txt extension.