Customer upgraded to 8.1 with 54xx series digital phones, one thing that is not working correctly, the time on the phones do not update while the phone is idle for a certain period of time, it's like the clock is stuck/frozen, when you hit the exit button on the phone to refresh the display, then the phone properly shows the correct time. This is affecting all 54xx phones, both 5410 and 5420's, all are updated to the latest firmware. Anyone seen this? Any ideas?