Valiant effort bug fixed.
From Wargaming: Our Developers have now fixed the issue with the XP bonus for the Valiant Effort reward.
In order to get the Mastery Badge when players have a defeat, players will need to have invested similar effort than for a victorious battle.
What’s more, the Bonus for Valiant Effort can now be received in case of a draw result.
We apologize for the inconvenience and we hope that you’ll enjoy the 3.4 update.
Thank you for your patience and understanding.
Your Support Team