  The superconducting transition metal dichalcogenides 2H-NbSe$_2$ and
2H-NbS$_2$ are intensively studied on account of their unique electronic
properties such as Ising superconductivity, found in multi- and monolayers,
with upper critical fields beyond the Pauli limit. Even in bulk crystals, there
are reports of multiband superconductivity and exotic states, such as the
Fulde-Ferrell-Larkin-Ovchinnikov phase. In this work, we investigate the
superconducting properties of 2H-NbS$_2$ through a detailed high-field mapping
of the phase diagram by means of magnetotransport and magnetostriction
experiments. We compare the phase diagram between bulk crystals and a 6~nm
thick flake of 2H-NbS$_2$ and find a drastically enhanced Maki parameter in the
flake, signifying a change of the relevant pair breaking mechanism from orbital
to paramagnetic pair breaking, which we attribute to an effect of enhanced
spin-orbit coupling.
