When using the Edit Motion Layer to do key frame animation, the locks to hold the hands and feet in a set location fail if the root bone is moved. The hands and feet move in arcs between the keys, returning to the proper location only at the keys. So in between keys, they move instead of remaining locked in place.
Add a character. Open Motion Layer. Make sure feet are locked. Advance timeline. Select pelvis and move down with the gizmo. Scroll across or playback tweened animation of the created clip.
