Ashe Q with Runaan's possible bug/issue [GAMEPLAY]

Hello,

I was testing out Ashe on the practice mode using dummies to check her DPS with certain item combinations, and I noticed that when you build Runaan's Hurricane on Ashe, and then use her Q to attack multiple enemies, if they are close enough she will attack a 4th or more target. It only worked when I had her Q activated at full stacks and was holding Runaan's Hurricane in her item set. I thought I was mistaken at first, but then I repositioned the enemy dummies and tried again and it worked the same way, when you activate Q and attack more than 3 enemies positioned close enough together. I then respositioned the dummies near the rift scuttle, and tried it again, and as it walked between the target dummies, my extra bolts exceeded the 2 bolts Runaan's provides. I was able to hit a 4th target, and if the scuttle walked close enough, a 5th target, (so all 4 dummies + the rift scuttle) with extra Runaan bolts with the Q flurry. It only worked when my Ashe Q was active, and I had Runaan's Hurricane in my item set and didn't work any other time. Other items didn't appear to influence this activity. When I took the runaan's away, her Q ability only hit 1 target like it was supposed to.

I don't know if this has happened in norms or ranked modes, or any mode outside of the practice/dummy mode.

Thank you for reading.