Leona Stuns

Hello, As i play only Leona i kinda got disappointed too see some strange things. I will not talk about how most of the champs got silence/stun skills making my Leo not so special anymore, but about how my stun (Q) look bugged. And i said "look" because even tho I play this game for some time, I still search my way thru it and not understanding some behaviors cuz I'm not reading any tutorial/info but learning alone. So, I expect my (Q) to STUN the target and not allow it do any further actions for a certain time. But this does not fully happen. When I (Q) somebody who is about* to give a skill, it will be hold it in that place but still allow it to give/end that skill. (he can't use any other skills after he end his act). There is this "1" second between the animation of my Leo (Q)-ing the target and the moment he got stuck there on which he (the enemy) can still perform an action. *if the certain target is not trying use any skill in that moment he will be stunned as i expect this skill to work.

My questions are: -My stun (Q) does interrupt a player to perform an action in that moment? (cuz if it doesn't, this says all) -Might this be a visual bug because is an online game? The enemy already finished his action but I didn't receive the "animation" because of the internet speed so for me it looks like he still is about to start the action.

Not sure about ultimate (R) because i did not have the opportunity to test it, but i believe it works the same as (Q).

-------offtopic plix plox more Leona skin!!!!