When repitching the second note of a group of two connected by a tie, the tie should be replaced with a slur instead of disappearing or moving the 1st note along too
The issue happens when repitching notes that have been incorrectly linked with a tie instead of a slur. This happens frequently when copying sections such as a saxophone section in a big band, where all saxophones (typically 5) play the exact same rhythm with different notes. The first instrument is copied, then the others are created by copying the first and repitching.
Two notes are tied (same pitch in the first part, to be repitched as two different slurred notes for the next intrument). We repitch the first one in Re-pitch mode, which automatically repitches the second and advance the selection. Then we step back to the second note and repitch it. It is now different from the first one and the tie has been removed. In such a use case, it would make sense to replace the tie with a slur instead of deleting it. Otherwise, we must hit the left arrow twice (switching from midi keyboard to computer keyboard), then the "s" key to create the slur, then the right arrow twice before going back to the midi keyboard.
The main problem isn't to have a few keystrokes more, but to have to look at the screen to detect when it happens. To be more productive, one has to minimize the number of times their eyes leave the paper score to look at the screen. Not only does it take time to find the right measure on the paper (putting a finger on it before looking at the screen helps, but for this, a third hand would be needed), but it is error-prone because this kind of music is full of measures that repeat several times, and it's very easy to go back to the wrong measure.
The solution would be that when repitching the second note, the tie would be replaced with a slur.
There is of course a workaround, which is to do what is described above.