I will try to type in the step I am doing

1. start my Cubase 10 Pro, new empty project, set the tempo to 90
2. load BIAB Vst, make sure in BIAB VST tempo is also set to 90
3. lead in/ ending unchecked start 1 end 16, 1 chorus
4. choose a scale, typed in few chords
5. load a real track (not a style) just a guitar track or any other insrument (does not matter which one, tried with different instruments)
6. click generate, now the problem is it only generates 12 bars and when you play within the VST, the highlighted bars go back to beginning
as soon as it reaches to bar 12 the player stops and highlight bar goes back to bar 1

see the above gif for demonstration..

someone suggested changing the bar count, but to be honest with you I am quite disappointed and to think I just wasted quite a bit of money on BIAB 2019 and also upgraded to 2020 thinking things would be better, so far not so impressed...