I'm surprised I've never noticed this missing frame, but all the jump cuts in SW have really stood out to me, since the early 90s: the explosion on the blockade runner after 3PO and R2 dodge the crossfire, a couple times when R2 moves, turning lightsabers on/off, opening/closing doors on the Death Star, etc.
Unbelievable that I never noticed the looped shot of the Tusken raider after so many viewings. Now I can't unsee it!