[Gameplay] Bug or Glitch involving Oracle's Extract on Howling Abyss

So the other day I was playing Poppy on Aram, and bought an Oracle's Extract so I could see the enemy Shaco. The problem is that I could still see shaco even after my Oracle's expired. Like clear as day. Since Shaco's stealth is considered invisibility, this shouldn't have been the case. Especially since the Oracle's was expired.However the vision did act like I still had an Oracle's on. I would only see him close to me. I have the replay on my account, but Replay.GG is missing it so I can't link the footage to the game. There is one point in the game where Shaco and I got into a 1v1 brawl (our teams were dead) and I seen him through his stealth and won the fight. Just thought I would leave this here!

If you want to thank me Rito, you can always make me a PBE tester ;) -Jukebot Hero