This grouping relates to the Fake Shake shots when Han and Luke shot down the Ties after fleeing the DS.

In 2019, the fake shakes are still there untouched but before and after the framing has been modified, sometimes just for a few frames. This first example Han starts reframed, then centers back to normal (the fake shakes are applied) then as the shot ends it gets reframed again which goes into Luke reframed, then centered to normal for the original fake shakes.

My initial guess is possibly this is a trick for the 3D presentation. To create additional sense of movement, the beginning and end of shots were moved to …provide more sense of movement.

But a few shots later a new trick emerges. Han moves but the background stays the same, but just for the last frame. In this animated image we give the end of the shot, hold on the weird frame, then toggle between the last two frames. Check out the the red and white lights in the lower left of the 2019.

Could this be a mechanical process result. Remember when OCP was doing Twixor tests and the last frame would be weird because it didn’t have a next frame to interpolate. But this seems more deliberate as if they chose to isolate moving Han and lock down the background. Again maybe this gives an effect in 3D.

Stabilization could be the cause of the next shifted example:

Multiple shots have the beginning or end shifted but then the shot returns to it’s normal location.

Note: check out the Humdinger Glitch shot without HDR, looks like you can see the garbage mattes again.