Top panel: evolution of the total EM energy from simulations of the IR case using FIL (dashed lines) and BHAC+ (solid lines) with GWRR corrections by employing the resolutions of 300 m (gray) and 100 m (black), respectively. Bottom panel: their corresponding evolutions of the growth rate. The shaded area reflects the KHI phase from t_sh to t_sh,1/2 for the 100 mBHAC+ simulation.