The thing I have noticed is that every time you generate, unless you have a track frozen, it generates a bit differently each time. Try a few regenerations. You might get lucky. I have. Freeze it when you get it.

Try splitting the line like was shown in the video, and change the bar to blue/green as needed. Experiment.

You can also CHEAT. I hate to use the word "cheat" because it's not cheating, it's being creative. There's no law that says you have to make it work completely to your satisfaction in BB. You can and should have a DAW. ( Real Band is a DAW ) It's generally pretty easy in a good DAW to find a fill or two elsewhere in the track and copy them out, splice them together in the first measure and create the fill or the roll for the drum intro/pickup. I can not count the times I have done this very thing. Not only at the start, but also in the song where I needed a bigger fill than was delivered by BB/RB.

It doesn't matter how you get to the final mix, just as long as you get there.

Just a peek inside my work process: The original sketch or rough draft I create in BB sounds nothing like the final mix that I put up in the showcase for people to hear. I have worked on it and made edits and cuts and splices and overdubs, and all sorts of things have happened in my DAW to get to the final mix with the polish and shine you hear. If I can get BB or RB to do something, it's all well and good, but as is often the case, they won't do exactly what I want so I have to figure out a way to get it done some other way. The only limit you face in getting something done in music today is the limits you set for yourself. Think outside the box and find a way to create what you need.

I have several examples but I won't bore you. You can figure out how to do this if you really want it. And, you will learn so much in the process.

You can find my music at:
www.herbhartley.com
Add nothing that adds nothing to the music.
You can make excuses or you can make progress but not both.

The magic you are looking for is in the work you are avoiding.