Bug when leaving spectating.
Gyazo
This happened to my friend on her account but I brought it up to the Riot Support Twitter, who advised me to post something here to be looked at.
Essentially she was simply spectating a friends game but had to leave it to play one of her own. Clicked to leave game and got a warning about leaving. Which was weird. Then when she queued up for a ranked game straight after leaving she was hit with a 5 minute punishment wait time for leaving a game as if she had actually been playing it.
That's all the info I have regarding this issue, but that is everything that happened covered. I have added a screenshot of the wait that popped up when this happened.