My felhunter sometimes cannot interrupt target when not in my LoS. I use spell lock macro, not command demon. Tested outside of arena and I was able to cast fel hunter's spell lock when he is not in my LoS 100% of time, but in arena it's always a gamble. Warlock interrupt is tied to pet this is disadvantage because pet can be killed or controlled, but it was always and advantage to be able to cs healers behind pillar.
Is this intended undocumented nerf to warlocks or another bug they will not bother to fix?