It seems that these numbers actually mean nothing.
here is a 32bit batch with chained acesCG->LogC3 ->acesCG → logc3 and so on
both of the 2Dhistos have the same result so it seems completely transparent
flipping the nodes to 16 bit or lower shows banding.
Which leads me back to this thread about timeline bitdepths , i will from now on set my timelines to 32bit?