Enclosed a midi file, and comparison jpg Notion 6 and Sonar 8.5 notation.
Notion completely looses track in a bar, repeatedly through out this file.
This is resembled in playback as well.
It's not about any rests or any details like that, completely loose track of what is what in between.
I was unable to figure out double staves into Notion, but that is another matter.
StudioOne and other daws play back this just fine.
Would be nice with a fix of this.