  Following updated and extended measurements of the full angular distribution
of the decay $\Lambda_b\to \Lambda(\to p\,\pi^-)\mu^+\mu^-$ by the LHCb
collaborations, as well as a new measurement of the $\Lambda \to p \pi^-$ decay
asymmetry parameter by the BESIII collaboration, we study the impact of these
results on searches for non-standard effects in exclusive $b\to s\mu^+\mu^-$
decays. To this end, we constrain the Wilson coefficients $\mathcal{C}_{9}$ and
$\mathcal{C}_{10}$ of the numerically leading dimension-six operators in the
weak effective Hamiltonian, in addition to the relevant nuisance parameters. In
stark contrast to previous analyses of this decay mode, the changes in the
updated experimental results lead us to find very good compatibility with both
the Standard Model and with the $b\to s\mu^+\mu^-$ anomalies observed in rare
$B$-meson decays. We provide a detailed analysis of the impact of the partial
angular distribution, the full angular distribution, and the $\Lambda_b\to
\Lambda\mu^+\mu^-$ branching fraction on the Wilson coefficients. In this
process, we are also able to constrain the size of the production polarization
of the $\Lambda_b$ baryon at LHCb.
