Aram Lux E not working

I was playing an aram game and out of nowhere the E key stopped working, it said it cost 0 mana, there was no timer, it was just like disabled. since its aram idk if Lux is having an issue everywhere or just there, or if it was just that game for me. but the e was normal for my next aram game (though I did not get Lux again)