Horizontal frame behaviour - Key signature changes

Hi there,

I have not read through the forums, so apologies if this covered somewhere, but I have had this issue a long time (though I haven't had much time for score-making in recent years).

I uploaded a file to illustrate my concerns.

I have not yet ever wanted to have a line like the first line, but if I did, it would be great if the tie acted as if it were a new line after the horizontal frame.

My main concern though, is going from line 2 to 3. I have often wanted used a horizontal frame to change the ending indentation on just one line, but whenever there is a key signature change, I lose the warning at the end of the line, despite the toggle still indicating to show it. (The tie does the right thing though.)

Thank you,

Nathan