This updater does not display behavior the way the Revit Documentation indicates it should. A simple move of an element will trigger the updater. According to the documentation a move "to a different location without modifying its shape is not considered to be a change in geometry and will not trigger the Updater".
Summary:
Returns ChangeType associated with a change in the geometry of an element
Returns:
ChangeType that can be used to define a trigger for an Updater, triggering on a geometry change in an element
Remarks:
Use this change type to trigger an Updater when the geometry of an element changes. Only physical changes to shape of the element(s) will trigger the updater. For example, changes like cutting a hole in a wall or adjusting its height are considered to be geometric changes. However, moving a wall to a different location without modifying its shape is not considered to be a change in geometry and will not trigger the Updater. Note: This change type will not trigger on newly created or deleted elements or on changes caused by Undo and Redo.
This appears to be a known issue from a Revit API post from <u+200e>12-26-2015 by Harry Mattison. nbsp;pp
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https://forums.autodesk.com/t5/revit-api-forum/getchangetypegeometry-triggered-when-wall-moves-but-g...
Aaron Lu of Autodesk indicated he logged this as "CF-3763 DMU".
