I've done all the BRAVE weapon quests, got both Superblack keys, and my triumph is stuck at 7/8. Talking to Ikora, Shaxx, Hawthorne, Devrim, etc. does nothing to progress this triumph in any way for me.
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I think somebody coded Shaxx wrong. He is constantly flashing and has nothing. Also the only person I was never prompted to speak with for a weapon.