ADA4091-2 Immunity Test Questions

I have the technical questions on EFT/B immunity (IEC 61000-4-4) fail at 4kV through the input power supply of 24Vdc common line.

We isolated the failure is caused by the ADA4091-2 because if i change to the existing part of op amp it will pass the 4kV EFT test in the exactly same design setup.

Could you help to advises any solution to solve this EFT/B immunity for industrial control IEC61000-4-4?