In the generating section of Realband (the band just below the rows of icons) there is a box for generating a 2 bar ending (adjustable). You have to select the number of bars in the 'from-thru' settings to allow for those two bars, not in front of it now, but there is a way to get it to cooperate better.
It is still not as good as it could be.
I'd suggest a possible adaptation to the real tracks that offers a sustained chord ending as an option... lets pile on the wishlist section of the forum!

I do not work here, but the benefits are still awesome
Make your sound your own!