Top panel: Distributions of $z^{\rm ch}$ for the jet-$\pt$ interval 10--20 GeV/$c$ for inclusive (quark- and gluon-initiated) jets with `MPI: ON, CR: ON' and `MPI: OFF, CR: OFF' configurations (left), and for gluon-initiated jets with `MPI: OFF, CR: OFF' configuration (right) using PYTHIA 8. Bottom panel: Ratio of $z^{\rm ch}$ distributions between HM and MB events.