Not A Bug Gurgling Anointer Did not trigger when Drawing Card with Scrapwork Mutt

[zorkmead]

<Match 255741157 Game 845142858
Cast Gurgling Anointer, Unearth Scrapwork Mutt, discard land, draw card, no trigger from Anointer

screencap of game log where it happened here

https://drive.google.com/file/d/17Qy0DIGEd9DzF6kLlTlecUp54ey4Mujx/view?usp=sharing