Two days before Lumina gets Vaulted, I [i]finally[/i] get a kill with a Hand Cannon (Thorn) before the invader killed any of my allies (no "Death Heals Primeval" message appeared before I made the final hit). However, I expected to get a Ping from my Lumina Quest to say I completed the task and I should go on to the next one, but no such ping or update happened. My account info also says I got [i]zero[/i] kills against Guardians from my last game, which completely contradicts the screenshot taken. I've done this Lumina step once before a couple months ago, but nothing happened (I assumed because Gambit Prime doesn't count), but now I think there is an issue. I'm really frustrated by the game not acknowledging my effort, and just want to complete the quest before the gun gets vaulted. Is there something I'm missing, or is the already-difficult quest just bugged?
This step does not require use of any particular weapon (no handcannon or rose needed) you just need to earn a [i]Not on My Watch [/i]medal. This requires killing an invader in less than 10 seconds and before they can kill any teammate.