There are several anti-clumping ingredients. I know that Sodium Silicate is used and (IIRC) Sodium Thiosulfate is used. Either has an effect on imaging. The Silicate can "dilute" the halide effect, and it can also fail to dissolve completely thus leaving a residue in the film. The effect of the hypo is obvious even at low levels.
But, I am speaking more about emulsion making than processing. The effects are far more pronounced in emulsion making than in solution makeup. Still, there are effects in either.