Just started using 2022, and I am finding that when I load an older project (in this case 2018) there is no audio.

Now, the style loads fine, user selected (as in not in the original factory style) realtracks load fine, arrangement loads fine. Audio drivers are set and correct. As in if I load a new song and load a style it all works fine.

It is just with the older project there is no audio. Song plays, but no audio. All mixer levels are at nominal, no frozen tracks, nothing muted.

So what am I missing in this new 2022 BIAB?