Bug in a Battle

My hero was with 0 Life Points but was not dead.

Your yellow tiles damage were unchanged and your Musashi able to gain mana?
The match ended with your win (due to immortality), a normal win or the defender defeated all of your Heroes?

I lost the match. Musashi not receive more mana but he should not die, cause his hability give him more life that the damage he take from Colen hability.

Same thing happened to me, I won the fight by the eau.