[GAMEPLAY] Yasuo exp bug.

Was playing earlier and experienced a bug where Yasuo would level up earlier then they should. Here are two videos. Both feature a Yasuo killing the very first wave of minions; one match Yasuo hits level 2 after killing 6 minions. In the other it takes him 7 minions to reach level 2. Both videos feature the champion standing well within xp range so there is no way a minion was missed.

https://www.youtube.com/watch?v=0rSr5bHyL5M

https://www.youtube.com/watch?v=2uJonQQy0ug&feature=youtu.be

If you look at the tiny purple xp bar below Yasuo's flow in the 2nd video; it looks like he starts the game with a small amount of purple XP. Which must be impossible due to having 0 kills/assits and having 0 minions die close to him.

EDIT: Upon further investigation. It appear to not be a bug with Yasuo somehow starting the game with experience that he did not have. Kled killed a ward in a bush, which counted as a CS, and it also gave Yasuo some XP. Basically a minions worth. The bug is that a ward counted as a CS and gave the same amount of XP that a CS gives.

Testing in a custom game, I was unable to hit level 2 killing only the first 6 minions. I considered the possability of XP quints, but upon checing the player that hit level 2 after just 6 minions, he had no XP runes.

His runes and masteries were: https://cdn.discordapp.com/attachments/70965021135343616/365380279122132992/Screen_Shot_2017-10-05_at_12.48.23_AM.png