I recently started my first long flight in the CS 777.  After all the flight planning, aircraft configuration etc. I taxied to the rwy to take off.  After receiving clearance for take off I pushed on the clock for running time.  Immediately the seconds started ticking off as they should have.  Once I got to cruise altitude I wanted to perform a fuel consumption check.  I looked at the clock and noticed that after an hour the minutes readout was there but NO hours (which would have been one).  I performed my check by using the minutes.  Three hours later I was checking my time enroute and again noticed that the clock was indicating minutes but NO hours again.  I did this one more time after about 6 hours of flight.  Again NO hours showing in the clock just the minutes and of course the seconds needle ticking away.
I surmise this is a problem with the gauge.
I have all updates installed.
Great aircraft except for the clock.

Please advise anyone?