BQ25886: Snubber circuit to reduce EMI

Dear TI experts,

My customer did EMI test with their own PCB using BQ25886.

They added C57 and R77 in the schematic below ;

and latest test result is as follows ;

result2.PDF

Could you recommend the initial values of resistor and capacitor for this snubber circuit?

My customer wants get lower value of the range between 180MHz and 250MHz in vertical.

Best regards,

Chase