I just had that issue yesterday and even hitting Play first didn't help. The instant I hit the scroll wheel to expand the view of the tracks the cursor jumped off the screen to the left and I had to use the scroll bar at the bottom to find it again.

What I did was reinstall the latest update and that fixed it.

I've posted about this kind of thing before. RB somehow gets itself what, out of alignment? Internally screwed up? I don't know how to describe it, it's just weird. It only happens when I'm really working the program, doing a lot of edits or in this case generating and regenerating a lot of Real Drums to put a drum track together. I've also seen strange stuff happen when I've done a lot of piano roll midi edits too. None of these little things happen all the time, they are all different. Sometimes simply closing/reopening fixes it and other times like this one reinstalling the latest update fixes it.

Bob

Biab/RB latest build, Win 11 Pro, Ryzen 5 5600 G, 512 Gig SSD, 16 Gigs Ram, Steinberg UR22 MkII, Roland Sonic Cell, Kurzweil PC3, Hammond SK1, Korg PA3XPro, Garritan JABB, Hypercanvas, Sampletank 3, more.