A grab point(?) of multi-line OSD display item (e.g. AH and HSB) resets to the center of the object as the item starts to move. This behavior is peculiar to multi-line objects and not seen on single line objects.
HSB is selected, and ...

moved one char left. Now the grab point is at the center of the HSB and the whole HSB jumped to the left to match the centered grab point.
