One of the minor new features for Revit 2017 was the nuance of how pinning a tag works.  In previous releases if a tag had been pinned  it kept an individual from moving the tag but it moved along with the element it tagged.  In 2017 when a tag is pinned it still keeps an individual from moving it, however it will stay in it’s given location as the element being tagged moves.  Note: The leader only moves with the tagged component if the Leader is set to Attached End and not Free End.

This is a very welcomed new feature, I have been an advocate of detailing using tags in lieu of text but was always frustrated that if a detail item changed the tagged would move and have to be realigned.  No more wasting time with this menial task