I needed four more measures in the beginning of my song so I selected all and "slid" my project tracks over 4 measures and now inside my melodyne tracks they are all truncated. How do I fix this? There is a grayed out section at the beginning of each track I can see the data but it does not play. I have done lots of edits and now it seem i need to go and undo all that. 
 
Any help is appreciated, thanks in advance.

Did you transfer tracks into Melodyne or did you use Region Fx?  This sounds similar to an issue I had sometime back having done some Melodyne edits and then time shifting some tracks having transferred in data to Melodyne rather than using Region Fx.  Does anything in this thread seem relevant?
 
Post 3077105 - Audio Chunk Shifted in Time