I believe quantum leaps refer to moving on another path in life. Causing a version change of your reality. This experience is also know as the Mandela Effect. I have experienced several versions of my reality. The Mandela Effect is True.

But the Mandela effect is not the same as an Astral Projection experience. Astral Projection experience disconnects your true self from the human body and off to another realm (time doesn't exist in these realms), but you come back to current version of reality you were experiencing before the journey. But with awareness. This awareness comes from the awareness of having the ability to disconnect from who you think is you.