Temporal variability of the azimuthally averaged mass flux after 119.75 (top panel), 121.25 (middle panel) and 129.5 (bottom panel) orbits for the run 3Mj-β₃, with specific features represented by the black arrows: a. South-North U-turn of material at the transition between the outer disk and the gap. b. South-North U-turn of material at the transition between the gap and the inner disk. The material either rotates in the poloidal plane around the planet, or is evacuated in the upper layer’s wind c. Top-down nonsymmetrical accretion streamer from the outer disk to the inner disk.