Dave,
Thank you so much for making the graphic (pdf) available that has cleared things up greatly. Quite honestly, I couldn't have easily solved the problem without the graphic.
I hope this is good news but, now that I know what I'm looking for, there is definitely a problem with the bass. Because of the graphic/sgu file combination, I can reproduce the F bass ending for the Dm chord.
Let me explain ...
If you zip back a couple of posts of mine, you'll see that I mentioned Realtrack (RT) #464 as the bass RT native to the style (and the one I used that gave me the correct D bass, and notation).
When you look at your pdf (see the image below), though, you'll see that the Realtrack that's being used by you is RT 921.
RT 921 is
DEFINITELY problematic. I have advised support about this and have referred them to this thread.
Why you had a problem ....
At the beginning of the name of your Bass (and Piano) RT, there's a "~~" occurring. Thanks to Videotrack who isolated this a couple of days ago, this double "~~" is indicating that your Realtrack is a subtituted RT because you are using the style at a tempo that is significantly outside of the tempo for what's recommended for this particular style.
If you go to "Opt | Preferences | Realtracks", you can disable this 'Auto-substitute' feature. Please see the graphic below.
On my system, I disabled this long ago and so when I loaded your song file, all was fine and the original RT 464 played bass. This gave the correct result.
On your system, the auto-substitute is active and because your tempo of 115 is well below the tempo of 140 for which the style is designed, the bass was automatically substituted to RT 971. RT 971 does not have notation attached and does have an ending problem.
As already mentioned, I have advised Support about this.
Hope this insight helps!
All the best,
Noel