Check the file /htfs0/NBossLog.txt at around the time that the CDR records changed the date.. do you see
any SNTP errors there? Just wondering if SNTP coming in a different format.
Since this occurs pretty frequently, can you try resetting the date /time on the NBX so it does not use
SNTP.. let it keep it's own time.. if the incident does not occur in a few days, we know it is the SNTP.