Not Given Back Enough Gold After Selling Item In Fountain

I just played a match where I bought an item in the fountain, sold it before I was even able to leave, and was not given back the correct amount of gold. This easily lost me the game, and tilted me beyond belief. To clarify, This was before the walls around the fountain had even dropped, so there was no way for me to have even left beforehand.

Please, please make sure this doesn't happen to any other player, and look into it. I cannot imagine how horrible it would be to lose a ranked game because of a bug like this.

If anyone could help me puzzle out how the league match recorder thing actually works, I can upload a video of me standing in the fountain for a good minute in utter disbelief as I am unable to purchase an item necessary to play the game.