please excuse how disjointed this is but i was thinking last night about how it was really odd that the twins seemingly passed over a teyvat destroyed by a supernova in the distant past, because nibelung was said to be born alongside the world and it got me thinking about how the voyager warns nibelung that teyvat will someday be destroyed and fall into an "endless night" and all

and tldr i think its possible that maybe the twins didnt pass over teyvat in the distant past, but in the distant future when the destined destruction has already happened. maybe the abyss twin left the spaceship because they were "summoned" and brought into the past, and maybe the rest of the spaceship was brought back later. theres the whole thing with the corrupted flight log data too.

plus - time travel and paradoxes and other timey wimey nonsense is not new to genshin (the sacred sakura for example) and has only been seen more frequently in the past year (direidyth, columbina, the mare jivari) - between istaroth and nibelung's abilities to manipulate time i think its a possibility?