Lux - E ability stopped working (remainder of game)

While playing in a teamfight, I launched an E into a group of players and activated it to explode on landing(new in patch). I died in the middle of this and upon spawning, my E no longer worked. Clicking it made it say "This ability can't be cast right now" or something like that.

I attempted to alt+f4 and then reconnect, the ability was still unable to cast for the rest of the game. That was incredibly limiting.

Hopefully I don't run into this again. Are there any log files I could submit or save in the future if this does happen?