The E6 and C41 bleaches contain Ammonia and halide. As such they are weak fix baths as well, which destroy part of the image. Use of them will reduce the finest grains to near nothing leaving the heavy deposits as Silver Ammonium Halides for the fixer to remove.

As such, if these are carried into any developer, they can redevelop. If it is a color developer, you get dyes along with the silver. In E6 then, you run the risk of having a totally black piece of film result. In negative color, you just get an odd effect from retained silver which is the extreme of using a faulty blix on color film.

The bottom line is that bleach bypass works on color neg but not on color pos. However, use of a B&W pos bleach before color development, with proper clearing bath before color development, you can then run a bleach bypass and get some really strange results. It goes as follows:

MQ
wash or clear
wash if clear used
Dichromate-sulfuric acid bleach
wash or clear
wash if clear used
reversal expose or reversal bath
color developer
wash
fix
wash
stabilzer with formalin (as you omit the pre-bleach here)

The results here, and only here will be somewhat akin to C41 bleach bypass if it works properly.

PE