Frequency separation ratios do not suppress magnetic activity effects in solar-like stars J. Bétrisey, A.-M. Broomhall, S. N. Breton, R. A. García, H. Davenport and O. Kochukhov A&A, 699 (2025) L9 Published online: 16 July 2025 DOI: 10.1051/0004-6361/202555930