Bug in Arena after introducing the new adventure

Hello,
I was playing my arena, my enemy have 3 life ( I’m pretty sure I had more life than him). I decide to finish the game with the spell hellfire so my enemy die. I cant’ remember my number of life but as I said I’m pretty sure to have more than 3 life. After this game my arena just finish( i was at 6 victory for 2 defeat). Even if I’m wrong and maybe I was low life, that’s situation it’ pretty sure an equal game at minimum. That’s happen 5 minutes after the introduction of the new chapter of the new adventure. I really think it’s a bug due to that and I find that pretty sad to be punish like that, being I little player of hs, and loose my arena I paid like that. Thank you.

This issue is unrelated to the release of the new adventure wing.
The issue and its cause is described in the “common issues” pinned topic:

Just had a game where i used Holy Book to steal spurfang making it a 10/10 , an ability gave it reborn and when it died it resummoned as a 2/1 and it did not trigger the deathrattle effect.