As long as you have a cha-cha style, let BIAB add a 2 bar ending. That should do the trick. Even start the end ing early - ie as part of the song.

click the little S next to MEMo, the select generate a 2 bar ending (about half way down) and Start the ending 2 bars early

As long as the final note of the song is the first beat in the bar ist should work

BIAB for Windows Version 2019 (643)
Windows 10 (1909)