Tannin seeping through painted oak cabinets

by TM
How do I prevent tannin from seeping through white painted oak cabinets? I have re-sanded, re-primed with Kilz and re-painted with satin enamel 3 times on one small area of one cabinet door, but the tannin keeps coming through and leaves a mustard yellow stain. Since priming doesn't seem to prevent this, does anyone know what will stop this from happening over and over?

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