Syndra related bug allows killing a teammate

I was reading the NA forums and I´ve seen 3 times that an ally kills another ally, always with a syndra in the enemy team. Here are the original posts: http://boards.na.leagueoflegends.com/en/c/bug-report/N6rT1Uyu-gameplay-my-teammate-fiddlesticks-killed-me <-- includes a gameplay http://boards.na.leagueoflegends.com/en/c/bug-report/usqKue0K-enemy-killed-their-own-teamate http://boards.na.leagueoflegends.com/en/c/bug-report/AA8tA1Kv-gameplay-i-somehow-killed-my-teammate http://boards.na.leagueoflegends.com/en/c/bug-report/lVHZvHVA-friendly-kalista-killed-me