Challenges freezing after win

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Challenges freezing after win

So I've been doing the limited and standard challenges lately. And very occasionally, around once every 10 matches, I win one and the game freezes. Worst part is, it counts as a loss since you have to exit the game. I've broken streaks so many times because of this, that I lost count already.

This is on Steam, don't know if it happens in other platforms as well.