Repro Steps:

1) Create a Page.
2) Introduce a Star Shape to the middle Grid created in Step 2), and from its context menu, convert it to a Path, then resize it to 256x256
3) Navigate to the Animation Panel, and create a new Storyboard.

4) On the first frame of the Storyboard, pick a Path Point (any), and note down its values. Then use the Path Selection Tool (A) to move the chosen Path Point to a new position across only the X-Axis. This will key a keyframe on Frame 1.
5) Move the playhead down the timeline to a different timestamp.
6) Select the Path Point with the Path Selection Tool (A), which will expose the Path Point's Properties.
7) Input the x-position value recorded in Step 6 to return to Path Point to its original position.

Observe how a keyframe is not created when updating a Property Value in this method.

Expected Results: Adjusting a Path Point Property by typing in a value has the same result as when moving it with the Path Selection Tool; in that it keys a keyframe with the newly-input value.