Quick Cast Locking During Champion Fights

Target Cursor Remains Active:

I am only guessing that this is caused by smartcast (quick cast), but here is the specific detail of the problem:

When I get into a fight against a champion, sometimes an ability will not only fail to go off (which normally could be blamed on some kind of user error), but the cursor (pointer) will end up frozen in the "first click" mode, as if I did not have smartcast on, and had hit the letter on the keyboard to prepare an ability cast, but not left-clicked with the mouse to activate it on a target.

The targeting circle will even remain on to show me its area, if it was an AE ability.

Because this never happens when attacking minions or monsters, I suspect that my smartcast attack is somehow being interrupted by an enemy champ.

I always have Smartcast/Quick cast on for all abilities. I wouldn't, but as far as I know there is no way to have custom settings for each champ (which you'd think would be a minimum feature of any well-coded game with multiple characters).

To reproduce:

1. Play a game with any champion I've used recently, for example Gangplank, Fiora, Jax, or Yi. I'm not entirely certain it's happened with all of them, though I think it has. Definitely with GP, whose mastery I'm leveling up in recent days.

2. Get into a fight with a champion who might interrupt your ability casts with some kind of cc (even if it's just an "interrupts channelling" attack). This may or may not produce the frozen cursor effect, presumably depending on the millisecond chance of a cast being interrupted.

3. Discover that, say, the mouse pointer is stuck in the circle for Cannon Barrage, or the target cursor mode for Parrley, and that any subsequent casts of it or any other ability has no effect. Frantically right-clicking to clear the mouse doesn't work, nor does any ability cast.

4. As you are about to die, realize that you have to left click to finish casting the original ability, even though no longer an inappropriate moment to use it. The click does finally cast the original ability, unless you die first.

I even had the cursor stay locked in targeting mode after I died, in this last game. At that point, even left clicking would not clear it.

To be clear, the ability target cursor then remains as my cursor, until I left click to "cast" it. This keeps any of my other abilities from being cast, as well as keeping me from casting that initial ability by hitting the given letter again.

Note that this mysterious half-cast cursor happens if I'm using smartcast on an ability that needs two clicks (one to bring up the target cursor, the second to choose the target and activate), like Yi's alpha strike or GP's Parrley. But I am having a similar problem with one-click self-target buffs and the like mysteriously not going off at all. I hit the R to cast Highlander or E to cast Raise Morale (as examples), and then right before I die — from lacking that added buff for the fight — I realize the ability in question is not on cooldown.

But THAT could, perhaps, be some kind of failure on my part. The frozen cursor thing cannot.

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Appendix:

Since I wrote that, I've played two games jungling, and realized that I am having a similar problem even against monsters. But it's not identical (so far). The cursor/pointer will suddenly turn into the same red diamond you get if you hit (A) to manually attack a target.

It then won't go away until I left click appropriately. I don't know what I'm actually doing that causes the target cursor to appear and persist like that.

This happened in my game as Fiora just now, and maybe in the previous game as Ekko.

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Addendum

My kid just suggested that the problem is actually Quick Cast with Indicator. He's had problems since he turned it on, as well.

So I just played a game jungling as Elise, with Indicator turned off, and despite the enemy's plentiful crowd control and my six abilities to cast, I didn't have the usual problem of the cursor locking into "indicator" mode.

Perhaps the bug is in that option. You can turn it off at the very bottom of Options:Hotkeys