Hyper Voice hits ghost types?

[Owen Phillips]

Hyper Voice from a Lv 51 Sylveon 1 hit killed both my Mega Delta Charizard, and my delta Aipom, both being ghost type. Hyper voice being a normal type move, can’t hit ghost types. I am confused

[Andres Ibarra]

Sylveon hidden ability is Pixilate. This makes all normal moves become fairy and gives them a 30% power boost

[Owen Phillips]

The bug was explained

[Owen Phillips]

Thank You!