I don’t know if anyone else has done this yet. and it is the weirdest thing. But if you go back to the Battle Pet Trainer…he is selling you the ‘pet battle’ skill again.
Like i already had the ability and suddenly i didn’t and now I can pet battle again.
Thanks for this wierd update Blizz that made me disable all my addons and believe you had a bug ( you still might because, why did I suddenly have to train for this again?!).