Hextech Flash Gamebreaking bug 21/3

Hi,

Today as I was playing Maokai I was using hextech flash. I used it like 3 times within the first 10 minutes of the game. After those 10 minutes my normal flash eventually got off cooldown and it was grayed out. Even though my team could confirm by pinging my flash was Ready it was unusable for the course of the 35 minute game.

Hextech Flash is something I will not be using for a while. I almost lost the game due to the fact that my team didn't have a solid engage on the enemy backline. Has anyone experience the same issue?