I have explained this to some degree, but yes and no. No because sometimes they will choose not to because they want to resolve their issues in physical reality. Their issues meaning, whatever their ego structure has created is so ingrained with their identity, that they cannot fathom getting rid of it and ascending.

Yes sometimes they do, sometimes they don't even realize that they have died, it's that gradual. And then other aspects of themselves, other "entities" are there to help create the illusion that they are still in the physical plane. It is there where they learn to ascend.

Now you must understand this, that an oversoul can have multiple lives going on at once, you, the "you" that you now know is one of them, however, the other lives, the other extensions of that same oversoul are living other lives simultaneous to yours. So, this means, you are all working together as one, separately, sharing experiences with each other so you can resolve whatever issues it is that you, and "they" (which is also you), have.