It's easy to see :
Make a project with 6 Midi tracks.
Open your 6 tracks in the Staff View.
Save your project with the staff view open.
Reopen, look at your staff view : Track 3 and 5 are missing.
This didn't happen before. I think it began with Platinum.
That's pretty annoying for me, because all my projects have the lyrics and lead voice notes in the track 3.
EDIT : Maybe I'm stupid and there is something with the Screensets. I tried to open tracks 3 to 10 and lock the staff view and save the project. But when I reopen, the Main Screenset shows me only 1, 2 4, 6, 7, 8, 9, 10.
I must click on 1 in the screensets to get my tracks 3 to 10 back, this reactualizes the Main Screenset.
Is it so or do I do something wrong ?
Thanks for your help !