Closed Caption bug: Captions sometimes appear longer or shorter than they should on screen
Closed captions appear longer and shorter than the length you have set for the individual caption
We have completely redesigned the captioning workflow in Premiere Pro version 15.0. You will see many dramatic workflow improvements. Please update to the latest version.
Learn all about the new captions workflow here: https://helpx.adobe.com/premiere-pro/user-guide.html/premiere-pro/using/working-with-captions.ug.html