Bug in Guild Wars with hero deathknight?

What you were expecting to happen, and what actually happened?
My second guild wars battle today, I won it, but in results tab it is writen as lost.

What are the steps to make it happen again?
Possible bug, I used Princess Elspeth to kill Deathknight hero to give all enemies deathmark. Killed all enemies, all my troops were alive (in place of hero was some summoned knight), won match, got Victory screen with rewards. But in results tab it said 1/1 and I must fight Vanguard battle again.

Do you have any screenshots or video you want to share with us so we can see the problem? Attach them to your post!
Don’t have screenshot, didn’t expect to have this problem. For rest of battles, I changed my attack troops, didn’t have this problem.