I don't know if this is a bug, but if it is, it should be fixed. About Evelynn canceling autoattacks

So i've been playing a lot of Blood Moon lately(pretty much purely Evelynn) and i noticed i come out of stealth when attacking a ward, but i cancel the autoattack and don't kill the ward(the wards have only been Zombie wards, since nobody buys oracles). Is this a bug? I mean imagine Eve irl. If she was stealthed and you cannot see her, since YOU act like a normal trinket(you don't see stealthed champions), since you cannot see her, she shouldn't be able to come out of stealth just by letting her hand close to you. Let me know if it's intentional or a bug.