Audiobook tracks truncated to half length on iPhone 6 Plus
I have several audiobook tracks that are about 5 minutes long and operate perfectly in iTunes on the Mac, but after repeated syncs and also trying a complete removal of all audiobooks followed by a re-sync to restore all audiobooks, these same tracks only run about 2:45. Using an iPhone 6 Plus 128GB (about half full) and MacBook Pro 17" early 2011, USB/Lightning cable sync. No change seen in this problem after upgrade from iOS 8 to iOS 9. Any suggestions would be appreciated.
iPhone 6 Plus, iOS 9, 128GB