Fiddler,
I've just had a play around with RTs 593 and 596 where I started a song in 4/4, changed to a single bar of 2/4 and then back to 4/4. The generations worked fine for me. Am I missing something?
I am aware of the misalignment of generation that you mention.
In earlier versions of BIAB, I found that when there were changes like the one above (4/4 to 2/4 to 4/4), it was necessary to put a chord on the beat 3 of the 2/4 bar. Even though this chord would not generate and play, it somehow 'kicked' the Realtrack generation into alignment. With BIAB 2018, I have no longer found it necessary to add this non-playing chord to align the RT generations. I interpreted this to mean that PG Music have addressed this behaviour. With this in mind, are you still having problems with the 4/4 to 2/4 and back to 4/4 alignment with BIAB 2018?
Regards,
Noel