Ties between 2 keyboard staffs creates a small unwanted tie elsewhere on the page.

I am working on scores for psalmody accompanied by the organ, so there are two staves. It is not uncommon to change the voice with which one plays a note, between the alto and tenor for example, at the mediant of a psalm (the asterisk in the liturgical text). In my case, this tie is at the end of the staff.

Normally, before 4.2, there would be a little tie at the end of the line, and the organist would just have to deal with this note moving to the other voice. Now, if I change the score (as I just did), the tie shoots up or down to the other staff, which indicates more clearly that the note is in a different voice, but then there is a little tiny tie at the bottom of the bass staff, which looks ugly, and I don't want that.

(NB: this is how the original accompaniment which I've adapted handles these things, and it's from the 1930s, so while it might not be ideal or best practice, I'm not going to reinvent the wheel here.)

Screenshot and score attached. The issue (well, the one where I took the screenshot) is on page 4 of the latter.