Hello,
--> Get Renegade
--> Have an LD
--> Reinvite LD player
--> Try to /groupsort
Then each of the 8 players are attackable/killable by other groupmates. LFF tag even states <Leader> with 0 group members. Only way we managed to clear the bug was every player has to log out, log back in, reinvite, get renegade again as a group.