tokens: The authors thank the anonymous referee for their helpful comments that improved the data analysis and strengthened the conclusions. The authors further thank A. Strugarek and J. Varela for the use of their data, as well as S. Mathis for extensive discussions and helpful advice. The authors also thank S. Tobias for his helpful comments. K.C.A. acknowledges support from the ERC SPIRE 647383 grant. A.S.B. acknowledges funding by ERC WHOLESUN 810218 grant, INSU/PNST, and CNES Solar Orbiter. J.T. was partly supported by NASA through grants NNX14AB56G and NNX17AG22G.
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