Not sure which bleach you mean, Scala or Tetenal ?
Agfa's research was into alternatives to Permanganate & Dichromate, and it was ongoing for quite a number of years and culminated in the change from Dichromate around 2000.
I'll hopefully test the bleaches in the Spring, I still have a lot of reading to do and then need to analysi all the potential avenues to pursue. So far I have already made some important steps into gaining full control of the B&W reversal process.
I'll keep you posted, I won't be keeping things secret.