He look lost in defense and didn't press enough. Just look at the second goal conceded to Atalanta, look at his position. He stayed too high up and did not defend at all. Brozovic covered his position and moved to the left and then Barella moved to cover Brozovic, which left a space a for Malinovskyi to shoot outside the box.
Every time when we lose the possession, Lautaro, Brozovic, and Barella are trying so hard to press the opponent, but Dzeko and Cahlanoglu are just walking slowly which gives the corresponding opponent so much time and space to pass the ball comfortably. Our pressing is the first line of defense, but it never set up right with these two players on the pitch.