Druid Wyvern bug - Act 4 battle final boss

As a wyvern druid I wasn't able to kill Tavakai in his first form.

Every time he pulled me by the chain, my character started to twerk and make "summon wolf dying" noice.

I couldn't stop it in any way. Also i couldn't move and cast any spells so i had to watch at this disaster till my death.

I killed him only thanks to my friend, becouse this happened every time I started the fight.