I've noticed several times where Ankora's passive doesn't activate when she is with Narses.  When ever a debuff that cause you to loose control of your character (as per the wording on her passive Fear, True Fear, Freeze, Provoke, Sleep, Stun or Petrification) on Narses according to the wording Ankora is supposed to transfer it to her and then cleanse it when she goes (because Narses is on the same team).  I'm finding that Ankora isn't transfering the debuff to her from Narses.  She has no debuffs when the debuff lands on Narses and she is fully booked so no CD on the debuff transfer so there shouldn't be any reason as to why she isn't taking the debuff.  I've had several fights where Narses gets debuffed with one of the above named debuffs despite Ankora being there with no debuffs.