Sometimes when i use shadowfiend he doesnt attack enemy, just stay near me looking to me. And at this point i have to use a spell on the boss to attack him.
Is this supose to happens? I remmember in wotlk we just had to use shadowfiend on an enemy and he would go alone, we didnt need to send him attack the target..
This happens to me too. I'm not sure if it is intentional. This is happening in Disc or Holy spec yes? As shadow you are dps'ing so you dont need to tell it to attack. Only thing you can do atm is just keep an eye on your pet bar when u cast your fiend. If it doesn't flash then you need to tell it to attack. Otherwise just make a macro for it.
It should just auto attack whatever your target is regardless but it hasn't been working very stably since 4.0. I just pop the CD and then immediately hit the pet attack button.
At the moment I am shadow and my Shadowfiend seems to attack a target which I send it to, by just summoning it. No need to attack it first. (Won't get loot if I let it kill the mob alone, though -_-)
Shadowfiend is quite clearly broken atm... i too get occasions where my shadowfiend will just sit at a boss and not attack until I spam the pet attack command a few times. I have a macro that casts shadowfiend, casts shadowcrawl and commands the pet to attack my target but that is unreliable. I even have had situations where i've been ganked by a pet class and though I cast my fiend on the DK or Hunter it goes off and attacks their pet.
I'd suggest blizzard are aware of it and will look at fixing it at some stage. I certainly haven't had so many problems with shadowfiend in the past.