Bug with Mega Altaria

I think there is a bug with East’s Mega Altaria. It’s Return ability is supposed to be a Normal type ability but it is hitting my Ghost type D. Charizard. I was unable to find any information about normal abilities hitting ghost types with either a mega evo nor with their passive ability (Cloud Nine).

Does anyone have any insight on why Return is hitting ghost types?

Mega Altaria has the Pixilate ability, which converts Normal-type moves into Fairy-type moves.