RB will only generate whatever section is highlighted. So you need to adjust your generation view to be more DAW inspired; work on this track from here to here.
That may explain your situation in RB if your From-Thru settings are not selecting the whole track.

You can right-click and Select Whole Track (CTRL+A)

The whole blue track designation also comes into play.

When you open an SGU file, the BB track names turn blue in RB and behave differently. You can change this using Track-Make all tracks regular tracks .. then the tracks behave like DAW tracks where you have to highlight the area you want generated.
When they are BiaB tracks they can all generate at once.

One of the differences between RB and BiaB.
If you open a SEQ file it'll likely have 'regular tracks' .. but if you open a BiaB file it acts more like BiaB


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