I’m not qualified in any sense to speculate, and so that’s exactly what I’m going to do.
My first thought is that there is a configuration happening to bring it home which we already knew, and there is a bug or test tone that was activated and since no one writing the code is there, they just didn’t notice it is still running.
I try to always remember People, process and product. PPP. It helps remind me that the people are just like you and I, families and waking up each day to do a job. It’s so easy for things to fall apart when there aren’t the right tools or processes in place. My failures individually or as a team never left someone in outer space but I’ve had some doozies in my career.
This isn’t addressing your comment but I guess it was on my mind. I do know that the majority of people want to do their best and I feel bad for them and those affected by a company’s poor decisions.