Hecarim E freezing the game in ARAM

So... After this patch I've had some very bad fps drops and my screen randomly freezes, but that's another story.

Since 7.24, I've also noticed that some spells totally freeze the screen for 1 or 2 seconds when activated/when they hit, and a major example is Hecarim's E.

I've played an ARAM game where the enemy Hecarim just jumped into me with E and then my screen froze for no real reason, causing me to die many times and there was nothing I could do about it. A friend of mine was playing and he had the exact same problem, and it was ONLY related to Heca's E in that game. Basically, every time I want to play ARAM I have to hope that there's not an Hecarim or I could just lose because of FPS drops.

It's not fun, actually it's unplayable, repairs don't do anything and I guess that it's related to 7.22/23/24 FPS drops. I'm posting here hoping that this information could help solving the issue (it's getting really annoying).

Someone else having the same problem?