Ah, good catch. I forgot to scale the point properly! How does the updated sketch look?

EDIT: Plotting it out as a point cloud seems to confirm your suspicion.

Without scaling: https://editor.p5js.org/spyrja/sketches/7IK_RssLI

Scaling fixed: https://editor.p5js.org/spyrja/sketches/kMxQMG0dj