Fizz bug (E disabled for majority of the game)

I was spamming E on Fizz whilst being Skarner ulted, to try and get away as soon as I was released. When Skarner ult ended my E was disabled (dull and unable to be cast but with no cooldown timer). I wasn't able to use it until a few minutes later, when I interacted with the enemy team again after 1 death.

Whilst being Skarner ulted, I was also hit by spells from Nami and Nautilus.

Sorry, no replay.