Just to clarify what's happening for anyone else reading this: if you're using a split screen or multi-window mode on your tablet (where you are showing multiple apps at once), that reduces the window size for Set List Maker, and that will make Set List Maker load a new layout for the new window size if one is available. Layout actions like sending MIDI on song selection are layout-specific, so you will need to add those settings to the new layout if they're not there by default.