Try making the first clearing bath of EDTA (DiSodium, not Tetrasodium), followed by two Citric baths.
My personal preference over Citric Acid baths is three baths...
1st of EDTA (Disodium)
2nd EDTA (Tetra sodium) or Citric Acid.
3rd Kodak HCA (or substitute Sodium Sulfite).
Using this, I've never had yellows with many, many years (since 1988) of Platine + Pt/Pd.