Bug Regarding Mirage's Decoy

There is a bug where aim assist only activates on the real Mirage (not the decoys) when using a controller (PAD).
Because of this, the aim assist locks onto the real Mirage among multiple decoys, making it obvious which one is real.
It clearly feels like a bug—so is this actually intended behavior?
If it's by design, please fix it immediately. It completely ruins the purpose of his Ultimate.
The solution is simple: aim assist should only activate after shooting the real Mirage.
The current issue is that aim assist activates before shooting, and since it doesn’t apply to the decoys, it unintentionally reveals the real one.