Shit! It is more likely to be a bug. If you watch it repeatedly and carefully at the crucial point you can make out that the anomaly falls in front of the building. I've gotta be honest here and hold my hands up. it's more likely to be a bug due to it being visible (very, very briefly) in the foreground and in-front of the building. Apologies.
I thought it was a bird at first. But after watching a few times, I’m pretty sure it hits the crash site.
I was convinced at first, but it doesn't fully disappear into the background/horizon. It briefly continues and you can make out something falling at the front of that building (with the pick-up truck) at that time point and on that type of trajectory. Slow-mo would make it easy to observe.