I had a similar "delivery failure" experience in bangalore anomaly a decade ago and that too from courier company FedEx which kinda guarantees delivery times. When I talked to the guy the next day, he apologized and said there were too many packages and that's the only way they see to push things to next day without getting docked for it. Shitty but that seemed to be the common practice - not that I ran into it again just going by how it was explained to me.

And then I have had it happen a couple of times here in US I think mostly during early Covid days probably when the prime delivery was new and still building its edge conditions around deliveries (taking pictures, emails split second after delivery).