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Reconcile muSR and field-trained transport and optical signals with high-resolution polar Kerr data and spin-polarized STM that found no signal. An answer is a symmetry-resolved measurement on the same crystals with sensitivity sufficient to detect the orbital moments predicted by loop-current theory.","problem_ref":"62ee513cb3a66d0eea3a54850d74edafc507be20df4dc6d889e429f9b0169d81","references":"","settled_by":"Kerr, muSR and neutron or NMR measurements on the same crystals, with a calibrated sensitivity below the predicted loop-current moment.","status_note":"High-resolution polar Kerr studies (2022, 2025) found no signal, while muSR and some optical and transport data report time-reversal breaking.","title":"Does the charge order in $\\mathrm{CsV_3Sb_5}$ break time-reversal 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