You may have noticed that after adding the ObjectGuid attribute to the WI’s column view, the attribute’s value displayed differs in format.
WI’s column view:
WI’s user object properties (object tab):
This is a product defect (TF00700318).
This will be fixed on the next maintenance release: 7.0.5 (Mid/late November 2017.
Please refer to this article for updates or contact support referencing the defect ID TF00700318.