Angular Clock bug at 56 minutes past the hour

Whenever my Angular Clock hits 56 minutes past the hour, the minute needle goes back to 0. Then at 57 minutes, it goes to 1 then 58 minutes to 2 then 59 minutes to 3 then at the new hour it goes back to 0 and proceeds normally until it hits 56 minutes again.

I have performed the calibration function which seems to work fine.

I have not made any modifications to the clock, it is stock from the factory.

Any idea what's going on?

-ambanmba