The JV-1080 may indeed need to be set to a certain mode to work reliably. I'd try paying attention to that.

As for Realband -
You may actually find Realband easier for this. Some users appreciate the Classic Tracks window where it is possible to simply enter the bank and patch numbers in a box. Also, RB patchmaps are in a different format than BiaB (especially when converted to the actual binary file patches.bin). So it's also possible you'll see different performance in RB in this respect. The two programs share a lot of features, but they are quite different in the programming. Don't be afraid to try it.

I know BiaB is better for certain approaches to creating a song and in some other aspects. But RB is just as capable in many other ways. RB, for instance, offers a much more intuitive editing of MIDI and Audio, and many more routing and FX options. MUCH more intuitive mixing. More control over the tracks. More Flexible Realtracks editing and generation.

So they are alike in some ways, but very different in many respects. They work hand in hand to get you from creation to finished product. Create in BiaB, finish it in RB. Lots of us go that route.

The cool thing is you get them both when you buy BiaB.

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