How deep is your defence? You’ll get hate for it and I’ll get hate for saying it but play with a deeper back line. I don’t play drop back but I play with quite a deep and narrow back line. Also have my CDM on stay back so he can help out the CBs. Having a narrow defence will push your CBs closer to each other and your full backs inwards too. It leaves space out wide but it will congest the centre of the pitch which is obviously where your problem are occurring.