Playing Pantheon, my abilities would not cast (not lag).

Possible bug with Edge of Night?

I was playing Pantheon top and this occurred at mid/late game around 26 minutes. Simply put, my abilities would no longer cast. I had just tried to use the activated ability on Edge of Night, and went to duel a Sion and Alistar. I tried to W, Aegis of Zeonia, stun the Sion while he was charging Decimating Smash, but it got weird. The dash completed but it did not interrupt the channel. Instead, the Edge of Night active disappeared and I could no longer cast any ability.

My build at the time was a Black Cleaver, Edge of Night, Mobi boots, and refillable pots. My summs were flash and exhaust. I was not lagging when this occurred. I could still consume pots, make gestures, flash my mastery emote, but I simply could not cast any of my spells. I left the game and reloaded but I still could not cast any spells. I also sold the Edge of Night, but still couldn't cast any spells. We forfeited shortly after.

VERY, VERY FRUSTRATING.