Has Zac's Hexflash bug been removed yet?

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Hm... idk about this one though. This one fundamentally changes how Zac works.

His E gains the immunity of his R and his R instantly acts out of his E.

Honestly Hexflash cancels as a whole seem to just be gamebreaking rather than skill expressive. We'll see I guess. Time to main Zac for a bit.

I mean I think this is a similar issue to Talon's E, where they can't fix the bugs without changing the entire pathing code in LoL. If they remove this animation cancel, it may result in the removal of all other animation cancels, essentially rendering Riven useless in the process.

I could very well be wrong, but I feel like if riot could fix it, they would have done that by now.

It's both. Riven's animation cancel was a bug until Riot decided to call it a feature. Lol.