Hearthstone stole my victory

[xlToushirolx-11794]

I just won an arena duel but the game counted as a defeat and finished my run, its so unfair

[bimblechib-2253]

Thats just really upsetting really, sorry

[Rhasimir-1573]

In the Common Issues thread on this forum:

Hearthstone Common Issues

Here are some of the commonly reported issues that can be resolved. Unable to use specific cards in Adventure Missions Certain card effects are disabled while in Adventure Missions. This is to prevent them from trivializing all of the encounters. Some examples include: Mindbreaker Sideshow Spelleater Grizzled Wizard Golden Cards are not animating on mobile? After installing the Hearthstone app, mobile devices will need to download additional files which contains extra sounds and animatio…

there is a section with a link to this:
https://us.battle.net/support/en/article/17276?blzcmp=app
Typically, the issue is one of disconnect during matchmaking. It could be because you internet connection is not stable, but it could also be because of any intermediate steps your signal needs to go through between your computer and the game servers.