In roughly 36% of cases where solar flares seem to trigger sudden magnetic-field shifts, the "change" may just be flare heating messing with how light escapes the sun's atmosphere. New inversions and 3D simulations show cold, ejected material and shifting line-formation depths can mimic real magnetic evolution, meaning current methods can't always tell fact from artifact.

— via arXiv — Astro-ph, Dimitri Arramy, Jaime de la Cruz Rodr'iguez, Adur Pastor Yabar, Jorrit Leenaarts