AegisSiege

Like... was this fight supposed to be the End Boss? Because unless it was, I don't think it matters. It was a basic skill check to get a cool sword. Chill out. You only have to do it once, and then you never have to go back to it. There are much worse boss fights in this game, and once you have to do over and over to get things that aren't as useful as a Large Sword of Glassy Doom.

I will Farm all the weapons again if they did this.

I have this bug as well. I forma'd my gaze and, although I didn't gain any mastery as I already leveled it a while ago, the bar started to show progression towards it being counted as Mastered.

My guess is there would be more of a Quest to Start the War, rather then Finish it. That way newer players will get experience the opening shots as well.