Working on a new track, it's the same thing. I have programmed the b drum pattern to start at bar 26 and run though bar 49. The b drum pattern starts at bar 26 but goes back to the a pattern at bar 32. I have build 426 of the 2020 version. It does this on every single song I use it on. when I open the plugin, the blue 'a' box is already there at bar 32. Perhaps they need to get rid of that, since it seems to stay no matter how the song is programmed.

See my post in the Mac forum on real tracks N/A. I may have found a work around that should be on your FAQ page.