problem with Doc Scrubber

Up till today I was very pleased with the performance of Doc Scrubber. However, today I noticed that 'analyze' a document after having scrubbed it will result in Total Editing Time set to nothing whereas the properties of my opened Word document tell me differently. By this I mean the overview that I get in Word when I choose File > Properties > Statistics. There the Total Editing Time remains unchanged.
Is this normal behaviour of Doc Scrubber that I just didn't notice earlier, or is something going wrong all of a sudden?
Thanks in advance for your attention.