The observation of the $$P_{cs}(4459)$$ $P_{\mathrm{cs}}\left(4459\right)$ by the LHCb collaboration adds a new member to the set of known hidden-charm pentaquarks, which includes the $$P_c(4312)$$ $P_c\left(4312\right)$ , $$P_c(4440)$$ $P_c\left(4440\right)$ and $$P_c(4457)$$ $P_c\left(4457\right)$ . The $$P_{cs}(4459)$$ $P_{\mathrm{cs}}\left(4459\right)$ is expected to have the light-quark content of a $$\Lambda $$ $\Lambda$ baryon ( $$I=0$$ $I=0$ , $$S=-1$$ $S=-1$ ), but its spin is unknown. Its closeness to the $${\bar{D}}^* \Xi _c$$ ${\overline{D}}^{\ast }{\Xi }_c$ threshold – $$4478\,{\mathrm{MeV}}$$ $4478\mathrm{MeV}$ in the isospin-symmetric limit – suggests the molecular hypothesis as a plausible explanation for the $$P_{cs}(4459)$$ $P_{\mathrm{cs}}\left(4459\right)$ . While in the absence of coupled-channel dynamics heavy-quark spin symmetry predicts the two spin-states of the $${\bar{D}}^* \Xi _c$$ ${\overline{D}}^{\ast }{\Xi }_c$ to be degenerate, power counting arguments indicate that the coupling with the nearby $${\bar{D}} \Xi _c'$$ $\overline{D}{\Xi }_c^{\prime }$ and $${\bar{D}} \Xi _c^*$$ $\overline{D}{\Xi }_c^{\ast }$ channels might be a leading order effect. This generates a hyperfine splitting in which the $$J=\tfrac{3}{2}$$ $J=\frac{3}{2}$ $${\bar{D}}^* \Xi _c$$ ${\overline{D}}^{\ast }{\Xi }_c$ pentaquark will be lighter than the $$J=\tfrac{1}{2}$$ $J=\frac{1}{2}$ configuration, which we estimate to be of the order of $$5-15\,{\mathrm{MeV}}$$ $5-15\mathrm{MeV}$ . We also point out an accidental symmetry between the $$P_{cs}(4459)$$ $P_{\mathrm{cs}}\left(4459\right)$ and $$P_c(4440/4457)$$ $P_c(4440/4457)$ potentials. Finally, we argue that the spectroscopy and the $$J/\psi \Lambda $$ $J/\psi \Lambda$ decays of the $$P_{cs}(4459)$$ $P_{\mathrm{cs}}\left(4459\right)$ might suggest a marginal preference for $$J = \tfrac{3}{2}$$ $J=\frac{3}{2}$ over $$J = \tfrac{1}{2}$$ $J=\frac{1}{2}$ .