Dota 2 battle pass quests are broken, locking away rewards

The Dota 2 battle pass has been put through the grinder this year, with players slamming the MOBA's reward system for being far too grindy. With the TI 11 battle pass reaching its conclusion, several players have complained that quests aren't unlocking the rewards once they've been completed - in fact, the game isn't registering their hard work at all.
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