Im having trouble with books getting stuck at a certain minute marker. When I'm listening to a book, and I get a phone call the book then gets stuck at that minute marker. (for example 7:43 seconds) and it if I go back to the story after my call it then always goes back to 7:43. I could listen for 20 minutes, and then pause and when i go back it jumps back to 7:43. When I erase the books from iTunes and re-add them, the same issue occurs. any ideas would be help