Shop Strangeness - Buying Liandrys and Morellos [GAMEPLAY]

In a game that I was playing as support, I tried to buy once I had and but, even though the shop said that I had enough gold, the item was grayed out and I could not buy it. I, then, sold to buy to try to get instead, but the price didn't come down (even though I had the ingredients) and I still couldn't buy it. This is the only game that I produced this bug, as the experience was too miserable to try to reproduce it in another PvP game. I have a screenshot, but I'm not sure how to attach it.