title not appearing in parts

dear all,
i am on Musescore 4.2 and i have a large partiture with many parts.
beyond single instruments parts, i also created parts with view of multiple instruments and then suddenly noticed that in one of those parts the title was not appearing.
I then added it manually but then it got duplicated on all other parts too.
i deleted it and then it disappeared from all parts including the general partiture.
When i created it again it did not show on the parts.
I think this is a bug.