Sett is not being targetted by turrets if there is an nearby ally minion
At the end of the clip - You can see how i'm running for Kha to kill, and very clearly my champion is first to enter the turret fire range, but for some reason turret targets the minion behind me. I didn't realize it that's why i turned back otherwise i would have keep chasing. This is not the only time i faced this thing - unfortunately this is the only clip i have. But this happens only with sett.