(DJ) Sona passive bug

I'm not sure if this is the case just for the skin because it's a bug that appears randomly, not too often but when it does it's terrible.

Sona's passive lands the wrong effect.

1. I use W, I gain the passive for damage reduction.
2. When i approach an enemy champion, I cast Q and that's when passive is supposed to be switched to increase the damage of the next basic attack.
3. After pressing Q, I click to attack, Sona launches the W- passive instead of the Q- passive. Despite the aura being blue around her, she still launches a green attack for damage reduction instead of the blue one for additional damage.

It's extremely frustrating because I died a few times because of it, chasing a champion on low HP and knowing I can finish them, but instead of the kill shot, the damage reduction passive fires. At first I thought maybe I got it wrong, like I clicked to fire before I pressed Q but every time this happened the basic attack fired after the Q attack, so I know I didn't fire a basic attack before the Q. I genuinely have no clue what causes it because most of the time it works fine.

I do get that I can wait a second after firing but that can seriously twist the balance in a fight, especially when I was up against Annie at 10% hp. I was at 50-ish % and upon surviving my green hit, she stunned me and basically had me for dinner at 2% hp or something.