Jayce got Assists when he died by helping the other team kill himself [Gameplay]
It also happened at https://www.youtube.com/watch?v=V8WIepYNRMg&feature=youtu.be&t=15m29s this may be a skin based bug as its using the new forsaken jayce skin. anyway, just wanted to let everyone know, feel free to check it out and see if it works or if it was just a one time thing