Can't summon Felguard

I'm on Icecrown server.
We killed Algalon yesterday evening.
I'm a demo lock and I used my Felguard.
I never had any issues with the warlock's pets before.
Suddenly after defeating Algalon my Felguard disappeared. I was thinking it was because it died so I tried to summon it back but since then the only thing I get is the voice of the Felguard and a message in chat:
You receive item: [Soul Shard]
but the Felguard is nowhere to be seen.

I have no problems with the other pets, just with the Felguard.
I tried everything: resetting talents, summoning other pets and then the Felguard, tried "Character Unstuck", changing to secondary talents and back, tried changing Felguard glyph but the result is the same.
I tried to contact a GM but I think they are all busy.
A guild mate has the same exact issue but with the Felhunter.
What else do you recommend?

Same here, just went Algalon 10 man and can`t sumon the Felguard. Imp works, Felguard is dead. Went Dalaran, tried to sum there also is not working. tried reload, relog cleared cache, can`t summ felguard anymore.

L.e: It comes to normal after few hours. weird bug.