Beam stretch bug

The button in beam properties that allows you to stretch a beam over more notes than it would naturally go does not work when you are going from the last measure of a line to the first measure of a line.

I have attached a file to show what I mean.

As you can see, stretching the beam over the measure line works when both measures are on the same line, but when you try to stretch the beam over two lines (or two pages, although not shown) it moves the beam to the above line, therefore making all notes with that beam appear to be quarter notes.

Although I do not use the beam stretch feature very often in my compositions, some pieces that I would like to transcribe (such as Schumann's "Toccata") have beams which stretch over more than one line.