[gameplay] bug that causes Sona's power chord to deal additional damage

1. have two stacks of power chord
2. autoattack a target
3. use a basic ability in the time frame of [before the attack hits the target] to [about .5 seconds after the attack hits the target]
4. a power chord autoattack will shoot out from Sona and hit the target (separate from the autoattack Sona made) which consumes the power chord buff

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At first I thought that this was just a visual bug, but i've tested the damage against Jungle monsters multiple times and it is definitely doing more damage than it should.

what should happen assuming you use Q after you autoattack:

1. your autoattack hits and does "A" damage
2. you use q afterward and gain your third stack of power chord
3. your q hits and does "Q-d" damage (q direct) and you gain the q aura buff (which will do Q-a damage on your next attack)

So you should do "A + Q-d" damage and end up with a full power chord buff and the q aura buff, so your next attack will do "A + Q-a + P" damage. So with two autoattacks and one q you will deal "A + Q-d" + "A + Q-a + P" damage.

what happens currently:

1. your autoattack hits and does "A" damage
2. you use q afterward and gain your third stack of power chord
3. your q hits and does Q-d damage (q direct) and you gain the q aura buff
4. a power chord autoattack shoots out from Sona, consuming the power chord buff and the q aura buff (applying them both). It hits the target and deals "A + Q-a + P" damage

In total you've dealt "A + Q-d" + "A + Q-a + P" damage with one autoattack and one q.