Steps to reproduce (via play)

1. go to last chapter of audiobook (track 43 in our sample book)
2. scrub or skip until you are closer than 15 seconds from end
3. allow audiobook to play all the way to end of last chapter.
4. audiobook will stop playing and go to pause state as expected ...

But after the audiobook stops playing at 00:00 remaining, the top timer countdown will continue calculating a display of "00:-01," "00:-02" and so on.  The duration-played timer below scrub also continues to increase past the track's duration.