Just seems like that to me. Don't read too much into it (pleaseEr why?

Just a question.. does it happen w/ every boss or only the first area. Haven't died yet but I did get Ending H:
After visiting Pascal's village that huge Assault happens in city ruins. Tried to go to the Amusement Park zone and because 2B and 9S didn't arrive soon enough, YoRHa got wiped out to the brink of extinction and lost the war. Cue quick roll credits. Now it says Endings: H on my save.