This has annoyed me for years but I've just worked out the problem/ fix:
HOW NOT TO LOSE THE SCORE TITLE IN LOGIC PRO:
Fundamentally, NEVER drag the left-hand edge of a region towards the front of the song, only ever the right-hand edge towards the end of the song.
(Unless you can think of a reason this might be useful it certainly seems to be a bug!)
If you need to re-size a region towards the front of the song (rather than move the whole thing);
- Leave the region where it is
- With the Pencil tool create a blank region (bar) where you want the extended region to start
- Glue the two regions together
A bit of a faf but it's a fix!
....And anyone needing a beautiful string arrangement, hit me up at http://www.stringarranger.co.uk