I know this feel, it still happens to me. Had a game the other day as Sona, got into a teamfight. Someone got grabbed over a wall by a Blitzcrank and I thought to myself - I gotta save that poor person with a Dance Party. I aim in that direction, but I notice my dance party shooting off into the jungle instead, and I suddenly die. I wonder what the fate of my teammate was but notice everyone else still fighting. It takes me a few seconds to realize I was the one who was grabbed. ;_________;And in team fights, I can lose track of my champion
I also contemplated if Sona's ult was somehow changed to where it teleports you to a teammate in danger. To my eyes I was still in that team fight; but I suppose I must have been looking at someone else that whole time.