Clock time stuck from last night

I have noticed that there can be a few seconds after reopening the lid of my Macbook that the time just started again from the moment that the laptop was put to sleep - e.g. 1:30AM. It is not _stuck_ : the seconds do start to increment. But then within a few seconds the time does get updated. Well except for this time. The time according to my laptop is *still* in the 1:30AM (plus about ten minutes) timeframe. Note that the Date and Time option to "Set time and date automatically" is set: Yes it would be possible to use date to update the clock, but why is this happening and is there a fix? **Update** The date / time did finally change now, it took about twenty minutes.