I can only imagine that it's to hide subtle timing effects from the notation, i.e., when someone is playing ahead of or behind the beat. One doesn't want hundreds of 1/64 notes or rests all over the notation. If one looks at the underlying data for styles, it can look awful. Quite why one would drop rests of 3/8ths duration, though, is quite another matter. To me that's just wrong.
I guess normally we just don't notice it happening.

It's been interesting, but had been driving me mad, because I was forever saying "I've already fixed this, why is it wrong again?". And on multiple songs! I'm also not used to handling that little four-bar notation window that seems sometims to jump around the piece is. It obviously has rules, but I find them puzzling.

I notice that if I select a rightmost bar on the chords view and the switch to notation view, I think it will centre the selected bar in the notation window, but I was expecting it to be the final in the notation view. Some of the dropped rests in that song then do appear in the final bar on the notation view, which is probably how I managed to correct only some of them.

All of that is further compounded by me creating the tracks on one PC and then syncing first to my fileserver and then syncing the PC at my keyboard from the fileserver. If I fix something on the latter, I reverse the process. I then get into "have I messed up the syncs somehow?"

I finally realised I wasn't going mad when I sat down and went very carefully through that song bar-by-bar, right back from the import, until I understood what was going wrong and could report it concisely. And it turns out to be a feature... cry

Jazz relative beginner, starting at a much older age than was helpful.
AVL:MXE Linux; Windows 11
BIAB2025 Audiophile, a bunch of other software.
Kawai MP6, Ui24R, Focusrite Saffire Pro40 and Scarletts
.