I just tried by selecting/loading a midi based demo song.
I played/selected the BASS track parts in notation and lead sheet mode and the notes played in red as the song played.
I played/selected the PIANO track parts in notation and lead sheet mode and the notes played in red as the song played.
Perhaps when you select " lead sheet " reset it to default and see if that fixes your problem. In the upper left hand corner of " lead sheet " select/click option and that will open the settings window where you can make changes or revert back to default.
Hope this helps.
when I play the song if I press on the notation icon I see the music if instead I press on the lead sheet I see only the chords. I would like to see the notes and the red note played at that moment