no much to say about that, dont know how that happen or its just an display error but see for yourself.

Edit: look at the HP bar from fiddle, sorry

Ah, right. I've seen that happen to other champions too. No clue what causes it.

That's a display bug. Has no effect on the actual game and should likely be fixed if you reselected him.

I've also had it where I was playing as Fiddle and a party member's HP bar extended all the way onto the screen. It went away after they took damage though.

You alt tabbed

lol @ the Twitch Quadra kill.

Looks like a purely graphical/interface bug, nothing that would actually affect the game.