Gale wings + Fly

[Hart1dechu]

I've just battled MJames

And i saw his talonflame gale wings using Fly(flying type move) so it gets the priority

For the 2nd turn of Fly(when i suppose to hurt) Fly suppose the be priority too, but nop, it's hurt on second because his talonflame doesn't outspeed my garchomp

I don't have any video, i'm just surprised by this. i try it in showdown and using my logic, fly 2nd turn suppose to be priority too xd

I tried to remake the glitch, but it's not working, that's strange :/