I usually find it easier to relax my eyes (focus too far rather than too close), and so the opposite occurred - most of the holds appeared to float in a single plane (slightly wavy perhaps due to lighting differences), while the incorrect hold was sunk further back.

Same! I couldn’t get it to work because that sailboat was in the way.

It's so weird ! The badly placed hold just disappears once all the rests aligns. My brain seems to dismiss it as an error on its part

Same, after some practice I could close one eye at a time and see the movement but it was hard to maintain the eye crossing with one eye closed

Took me a bit to realize the last photo has it correctly, and to stop trying to find the discrepancy there. Looking at only the first image it pops out to me because the wrong one is floating closer to my eyes than the rest.