Irelia Stun Bug? [RIOT please read]

I don't know if it was the specific player using a third party program or hacking, or if it is an actual glitch in the game, but something is wrong with Irelia's stun. (2 parts) I just got out of a ranked match against an Irelia and, knowing the way her stun works, I made sure to play our fights properly. That being said, I did slip up and die a number of times, but that's not why I'm here; I'm here because there were multiple points throughout the entire game where Irelia was stunning people who had a lower percentage than she did. I watched her, at full hp, stun a 30% hp Akali twice in the same fight (one stun, invis bubble for the duration, another stun), and at both points Akali had lower hp percentage. She did the same thing to me, I was at 50% and she was at around 80% (i had hit her with one q as Pantheon) and the stun still went off... again with it happening twice in the same fight. She stunned me, bursted me down to about 25%, stunned me again and killed me. That being said, Irelia's stun is glitched or that specific player (TacoChickens) was hacking. (part 1/2)

After asking the Irelia in /all chat why she was able to do that, she kept claiming it was a "lucky stun" or that Irelia can stun opponents who have the same percentage as she does. Luck has nothing to do with it, for one, she was obviously stunning people with lower health percentages than herself; secondly, Irelia's stun does not, to my knowledge, stun targets with equal hp percentage. After the other player's insistence that I was incorrect, I looked it up. The tool tip in-game on the death screen, the champion info in the store, AND online sources all indicate that Irelia's E can ONLY stun when the target is at a lower health percentage. (part 2/2)

All in all, if this is a bug, please fix it; if it's not a bug and user TacoChickens was hacking or using a third party program or whatever, please ban the user. Now, as far as part 2 of this discussion, if Irelia's stun truly is meant to stun at equal health percentages as well as when the target has higher health percentage, we're leaning into the realm of a highly broken champion. Not only does Irelia get a two-second stun to initiate fights, as well as turn them around, it's on a brief enough cooldown to use twice within the same skirmish. Keeping that in mind, she has extremely high mobility due to the reset on her Q with a low enough mana cost to not get punished when using it willy-nilly. The real kicker? On top of having a two second, short cool down stun, and a dash with low mana cost and reset, she also gets an ability that passively gives her auto attacks health restoration that ALSO gives her true damage and doubled health restoration upon activation, AND she gets a long range ult that passes through minions and siphons hp. Does that not seem like a lot to you? This champion needs to be changed but at the very least PLEASE fix her stun!