Karthus quick cast with ranged indicator (doesn't work!)

Can you please fix Karthus Q so that it shows range indicator when it is supposed to? Currently, when the player uses "quick cast with ranged indicators" option, the Karthus Q does not show ranged indicators as it is supposed to.

Because it is a long range spell, and also channels, it makes it much more difficult to play Karthus without the ranged indicator. Casting beyond range will cause Karthus to walk forward and cast, leading easily to mispositioning and death. Players should not have to spend hundreds or thousands of games on Karthus until they know the range intuitively in order to cast where they want to cast with his Q.

THIS HAS BEEN A PROBLEM FOR YEARS AND BEEN COMPLAINED ABOUT MANY TIMES BY MANY DIFFERENT PLAYERS, PLEASE FIX IT.

Thank you.