Time Tracking on Iphone doesn't stop

Time Tracking on Iphone doesn't stop

When I start a time tracking session the timer starts as expected.  However when I hit stop, the timer remains on that project.  The only buttons available are discard and start.  Start runs the timer more and discard says it will throw away the data from this session.  

There is no way to stop, end this session and move on to track another session.  

Can anyone assist with what I'm doing wrong?