what is this acid sulfide bath you are referring to? Is this something like thiosulfate in B&W reversal to clear the highlights?
Remember that colour development works because developable silver halide oxidizes colour developer, and oxidized colour developer reacts with coupler to form dye. If you have carry over colour developer when bleach enters the stage, strong bleach will oxidise colour developer which in turn will form unwanted dye. For this reason PE recommends a sulfite clearing bath, with a suitable recipe provided (there was a url link here which no longer exists).