Maximum damping scale where the PBS can be valid and bias scale-independent. The three reddish contours show the break-down scale of density-only bias models, estimated with bias parameters measured at different scales, and the three green-blueish contours show it for (δ, L) bias models. The black dashed line shows the wavenumber associated with the Lagrangian radius of halos. The break-down scale is consistent across different measurements and only seems to scale strongly with halo radius for the (δ) case.