SpaceX Anomaly Falcon 9 CRS-11 video

Was just watching the video of this launch & as it was starting its decent back down I noticed something zip very close by. If it was something ejected during launch it came dangerously close to destroying the rocket. Its shape was what caught my eye, it doesn’t look like something you would see break away from a rocket during different stages. It reminded me a lot of the boomerang ufo I recorded earlier this year. It had three wings or what looked like some kind of wings. Only this thing was rotating head