I could buy a Spear of Shojin in a normal draft 5v5

LT;DR I could buy a nexus blitz item in a normals

In a normal 5v5 game as kayn the store showed the nexus blitz item Spear of Shojin... I don't have a screenshot of the item in the shop because I didn't think anything of it until it was gone the next game. I never actually bought the item but I had the BF sword and hp crystal in it's buildpath. I linked the game in my match history in case you (riot) can see which items were available per game but I feel like this is a huge bug that needs to be patched. I'll take and link screenshot if this happens again!