Volcoross bug when played directly from deck to field

Played a game vs. Rogue, we were late into the game, I’ve played Volcoross +30/+30, he sent it to my deck with a corrupted dream card, I’ve played Varian Wrynn I’ve generated from Treacherous Tormentor and pulled 3 minions to the battlefield, Volcoross included. I couldn’t choose Volc at all, to attack even though he had rush or to hear he had attacked already or needed a turn to get ready. The taunt symbol wasn’t showing, and when my opponent’s turn was up (he had 7 minions on the field), he couldn’t attack Volc and couldn’t attack my face or other minions I had because a taunt was in the way, thus he surrendered.