Spiritomb did not block Fusion Drive on Genesect V

Like title says, I had the Misfortune Spiritomb on my bench yet my opponent was still able to use their Genesect abilities. They each had a Forest Seal Stone on, which I know can be activated regardless of ability lock. Maybe the game confused the tool with Genesect's normal ability? In any case, I lost because of it. Thanks PTCGL