$\rm \langle Y_{n \Lambda} \rangle$/$\rm \langle Y_{n {\rm K}^{0}_{\rm{S}}} \rangle$ as a function of the unbiased average charged-particle multiplicity at midrapidity. $n$ runs from 1 to 4, from top to bottom, respectively. MC predictions from PYTHIA 8 Monash 2013 (dotted lines), PYTHIA 8 QCD-CR + Ropes (continuous lines) and EPOS LHC (dashed lines) are also shown.