He's made a nice (and improbable) comeback from full-swing yips. It's not surprising that he played just fine at that pace. He said he did his full routine on each shot (but possibly backed off less), though he ran in between each shot and between holes.
I would disagree with the implication that your memory becomes a blank slate. I think maybe you'd dwell less on good or bad shots on prior holes vs. the shot that is right there in front of you, but it's not like your memory of events become a blackout fog. I would argue that being mindful might actually increase the strength of memories and the ability to recall them vs a mind that is distracted by 'other things'.