[GAMEPLAY] Invisible Twitch getting AA'd during Thresh pull

After going fully invisible as Twitch, the enemy Thresh landed a lucky hook and grabbed me.

When he pulled me, the enemy Vayne was able to target and land an auto-attack on me.

[This was during the laning phase, and the enemy didn't have any pinks out. Vayne wasn't able to target me after that one hit, and I was completely invisible well before Thresh started throwing his hook]

While I can see this thematically making sense: "Quick, shoot an arrow at whatever I grabbed with my hook!" This isn't consistent with how League plays.