[GAMEPLAY] Cooldown Indicators Incorrect

So during this last past update now, I've noticed that the cooldown indicators on my abilities are completely incorrect. Q, W, E and R will show themselves as being available to use, but if I try to use them, they actually won't trigger. Moreover, if I used the alt-click to show timers on the abilities, it will show the true cooldown of the abilities being several seconds longer than the ability indicators display. I am not yet entirely sure if this is affected further by cooldown reduction. This will happen regardless of cooldown reduction, although I'm not sure if the effect is amplified with increasing cooldown reduction.

This actually also applies to the death timers. If I am dead, I won't rez until several seconds after it shows my timer as being '0'.

This has occurred in every single game I have played during the new patch. I'm not sure if this also occurred in last patch, as it seems to have happened for a few games now. It is true of both ARAM and normal draft games.

Please fix this; it's literally impossible to play properly when I think an ability is up, only to realize the game is trolling me.