Star Order ability doesn't work on Mew VMAX

Alphaia_CORP

I used Star Order from the Sky Steal Stone on my Zacian V then attacked, knocking out a Mew VMAX and only drew 3 prize cards instead of 4... I could have won the game.

Alphaia_CORP

Post from another use linking this behaviour to Fusion Energy: https://community.pokemon.com/en-us/discussion/2028/sky-seal-stone-not-taking-the-extra-prize-on-pokemon-vmax-with-fusion-strike-energy