Clock and Timer in Garmin 1000

The Clock/Timer at the bottom of the Garmin 1000 in the Cessna doesn't seem to work right. As the seconds reach 00, the minutes don't advance until about a half minute later. The elapsed time timer seems to do the same thing. After several minutes, the clock's time is off from the real time also. I checked it against a watch. Has anyone noticed this and is there a fix? Thanks. Tom