Vedeja It seems like the playlist can show 1-3 rows. That variance can cause the song blocks to have different height which might not be a good viewing experience. Maybe always limit to 1 row?
I'm not sure the software should impose that. If you want to have 1 line of notes in Song1, and 3 lines in Song2, and you don't like songs being different heights in the Playlist/Song List/Queue, then don't put in different 'amounts' of Notes! If you start imposing visible line restrictions, you'll have the person that has 3 lines of notes on 2 of their songs complaining, and then others complaining about blank space, etc.
I can appreciate there may be differing perspectives on how that Notes field could be used.
Some might want the contents visible in list (like current behaviour), others might be happy to not have them visible and just use them for 'internal notes'.
To @MarkGuitar point, Peter has mentioned adding a dedicated Key field on the Song Details page, as well as created a Poll (https://support.stagetraxx.com/d/3557-poll-which-data-info-should-be-displayed-in-song-lists) to get feedback on what fields people might want to see in Song Lists. Definitely add feedback on this topic on that thread and fill in the Poll with your thoughts!