So yesterday I played a game at a gaming arena. I'm pretty sure they didn't have league unlocked as not all the champs were available.
Anyway I played an unranked 5v5 game and picked janna. I have the weather forecast skin for her and chose that.
However when the loading screen came on, it said I was in the star guardian janna skin, which I don't even possess.
On top of this I had this really fancy boder. I didn't recognise it but looking around on the internet afterwards, it appears to be the challenger border. I'm only silver.
I only played one game so not sure if it was just a one off thing or not.
Does anyone know why this happened?