  In neutrino oscillation physics numerous exact degeneracies exist under the
name LMA-Dark. These degeneracies make it impossible to determine the sign of
$\Delta m^2_{31}$ known as the atmospheric mass ordering with oscillation
experiments alone in the presence of new neutrino interactions. The combination
of different measurements including multiple oscillation channels and neutrino
scattering experiments lifts some aspects of these degeneracies. In fact,
previous measurements of coherent elastic neutrino nucleus scattering (CEvNS)
by COHERENT already ruled out the LMA-Dark solution for new physics with
mediators heavier than $M_{Z'}\sim50$ MeV while cosmological considerations
disfavor these scenarios for mediators lighter than $M_{Z'}\sim3$ MeV. Here we
leverage new data from the Dresden-II experiment which provides the strongest
bounds on CEvNS with reactor neutrinos to date. We show that this data
completely removes the degeneracies in the $\nu_e$ sector for mediators down to
the MeV scale at which point constraints from the early universe take over.
While the LMA-Dark degeneracy is lifted in the $\nu_e$ sector, it can still be
restored in the $\nu_\mu$ and $\nu_\tau$ sector or with very specific couplings
to up and down quarks, and we speculate on a path forward.
