I was playing as Panda Annie in mid against a Varus. I decided to Flash+Ult+Q+W in quick succession and killed Varus. However, afterwards I noticed that Tibbers was invisible. When I first used the spell it showed the normal animation of Tibbers being summoned, but Tibbers himself was invisible. He was still there, I could control his movements and he was taking shots from the turret.
This only happened once during the game. Any other time I summoned Tibbers, I could see him.
thanks for the posts, all. for those of you that have seen this, just a couple follow-up questions:
-were any other players able to see tibbers?
-are you able to provide a game log from that game, and/or recall what your video settings and ping were?