hi, in all fresh installs of ATT all Wow aniversary achievements/pets removed from past years are tracking by default etc digging a bit why i found this:

the wow anniversary removed is inside of seasonal filter and should be in unobtonaible

ingame:

I actually pushed a change for this in (e8a0e1a) earlier today haha. So yea it has been moved to the Unobtainable section :)

oh thanks