I just now got it to appear, I had to touch the mirrors rather than just jump through like before. Definitely tried gliding and seeing if the buff went away, and it didn't. They'll look at it eventually I figure.
https://www.guildwars2.com/en/news/choose-your-style-with-the-forest-archer-pack/ Definitely this, I sadly missed out on it, but would absolutely love to have it added back again.