We are in the same boat as you. Just discovered, per Apple Support, that Final Cut does not support Closed Captioning. So anything you bring into Final Cut that is closed captioning – FCP does not retain it. This is strange – since we are able to see Line 21 when played back on the timeline and when dropped to tape – but the monitor is not reading it. We are testing it now by moving the video a line up and a line down. Not sure if this will work – shows you where we are with this. Have you heard otherwise?
Danny