It would be better to share the .cpr file. There is something that is corrupted about the midi tracks from the project. I figured out that if I open the piano roll editor and copy all the midi notes and then copy that in to a midi track then that new track exports correctly.
With this project. you can export the midi file and then import and the notes are the wrong length. If you create a new midi tracks and copy the notes in to the new track and export/import, the new track is correct.
Midi_Problem.zip (16 KB)
One possibility I’m thinking is that the original project was done in 7 or 8 (I don’t remember), though it opens fine in 9.5.