i have done a bit of inside hunt for info,and despite the trip to bangui there is indeed something;its about chemin de fer,many of the older guys are not appreciating how its younger guys who got co-leads on some songs with jb while they got just a couple of vocals
they see it as an insult to hierarchy and history
but fortunately or infortunately its not something too major as if the guys are determined as hell to leave
and i have also been told that jb did that on purpose because he sees the future of bcbg in the younger guys,and he did not want rude ways like unsettling on stage and off stage to somehow force them out so the most natural option was handing abel,fudji,josky,abraham and atshuda if i remember well co-leads instead of the kibens and co so that they understand that things were about to change