Notes. The ratio of N_eff between the blending-only simulation and the whole simulation is calculated from the measured catalogue with the lensfit weight taken into account. The is the mean residual bias introduced by the shear-interplay effect, estimated from the blending-only simulations (see Sect. 5.2 for details). The correction to the whole sample should also account for the N_eff ratio and the correlation with the signal-to-ratio and resolution (see Sect. 5.2 for details). The Δm_PSF is the residual bias introduced by the PSF modelling errors (see Sect. 5.3 for details). The m_raw results are derived from the idealised constant shear simulations (Sect. 5.1), and the m_final are our final estimates with the corrections for the shear-interplay effect and PSF modelling bias (Sect. 5.4). The uncertainties quoted along with individual m values are reported by the linear regression fitting, thus only reflecting the statistical power of SKiLLS simulations. All results are based on the KiDS-DR4 re-run with the updated lensfit before any redshift calibration. They only indicate the general performance of the updated lensfit.