Hi Jim:
Yes, I'm opening almost all files as an Administrator so I can't understand it... These 'problematic songs' are NOT produced by me - I downloaded them from Internet (my play ALWAYS the Introduction).
I even tried to delete these 4-bars 'not-played Introduction', then 'inserted' a new Introduction by using the Edit/'Intro-Bars AutoGenerate' Option at BIAB but all without any success...strange!