Ahri Bug and Other Champions Supposably

After my first game today, I came across a bug that basically ruins the game play for the champ. Maybe it was just my client bugging out, but after a restart, it still did not fix it. I did not experience this earlier this patch, so I do not know what caused it. But basically, the quick cast was broken. I always have all of my skills, and actives on QC, but today, when I was playing Ahri. my spells would not cast for probably half a second to .75 seconds. My ping was fully stable at 50ms. so that isn't even 1/10th of a second delay (no walking delays either). And then I notices that the hit box would show up as I went to cast an ability. Example, I would throw my q, and the box would show up briefly before casting the spell. This made my game impossible to play, ESPECIALLY with an assassin where your skill combo is essential. You basically need to predict where the enemy will be in 1 seconds time, and even then, it still doesn't cast sometimes. So Please Riot look into this, as it will make my main champion completely unplayable until this is fixed.

Kind Regards.