I know you're thinking in terms of mistaking the tank for Germans, but generally, I think there was certainly a bit through Normandy following the break out from the beaches. Typhoon fighters were being kept up in the air as much as possible and the pilots got pretty gung-ho for a while. They were not as tight on identifying their targets as they could have been with all the adrenaline flowing (that was the thought anyway). I remember one Brit vet in an interview commenting that they were chopped up four days in a row by them. Anecdotal, obviously.
In the book Flamethrower, by Andrew Wilson, the author recounts how someone salvaged an abandoned Panther in Normandy and was using it, but was ordered to get rid of it lest it cause a friendly fire incident. I can't recall the details. Maybe someone who has the book can look it up.