Well, I just loaded up your file and played it from beginning to end. The song appears to be framed to end at bar 98, but with the 2 bar ending (really 4 bar to allow for fade out) it really ends at bar 102.
The song just stopped like it was supposed to at bar 102 and did not go past into later empty bars.
So for me, it worked as expected. I'm running RealBand 2017 Build 7 Release 1.
You might want to try a "factory reset", however, this will require re-selecting your audio devices when you relaunch RealBand. The information about it is found
here.