Include the current task in the Timer as part of the Total in the bottom right. (And updating every minute would be fine. I don't need to see the seconds ticking off and using CPU).
As a person keeping track of my time I would like to know if I've already worked the desired number of hours without reading the total at the bottom, and the time on the timer and doing the math myself.
Perhaps there would be Completed: {duration} Timer: {duration} Total: {sum of Completed and Timer}