Losing the tail could be either cause or effect, but without the tail the center of gravity is way forward of the wings, and the horizontal stablizers in the tail are missing. Could easily lead to a nosedive.
Or the tail could have come off in the attempted recovery of level flight, from too much speed and stress.
Hmmm
I’m hearing different opinions on whether this falling object had wings or not.
If it had wings, it will not go vertical, IMHO.