[GAMEPLAY] My teammate (Fiddlesticks) killed me

I (Janna) was playing a Normal Draft game with my friend (Rek'Sai) in this game. http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/2186678705/213348422?tab=overview

Everything was fine earlier. (And after, really). I went mid with my adc, and fought in teamfights in mid lane.

At 19 minutes though, when we had a teamfight where both sides were trying to contest for dragon, the game said that I have been slain by Fiddlesticks (a teammate). (And I died too.) (I don't remember how I died because death timers are pretty short at 19 minutes.)

Fiddlesticks was also confused at how he killed me (Janna). Lucian knew I died, but he said it was probably Nautilus's ult? After, Fiddlesticks said that he got gold off of me anyway, so my death wasn't that bad.

We shrugged it off and continued to play the game as normal, and everything was fine after that.