Gas density ρ_g in the mid-plane (at a height z = 0) as a function of the radius r. The blue line shows the initial density profile, while the orange and green line depict the profiles after 50 kyr in simulations including the static mesh refinement employed in SJB20 and in this study, respectively. Notably, a considerable bump at a radius of ~30 au is present in the former profile, but not in the latter one.