I was playing Alistar and was also using hexflash as well. After a certain point in time, the icon went dark (as it is when you haven't leveled a skill yet or when a skill is on cool-down) and I was unable to cast the flash spell for a long period of the game.
DuckSIut1 votesI just got the same issue, i don't know the fix but you aren't alone out there :D
TankerSmite1 votessame thing just happened to me showing that this is still not patched
admirable potato1 votesstill not fixed, happened to me as well twice
admirable potato1 votesi think its when you use it when its just about to be back up but idk
Panguh1 votesSame thing happening to me :(
