Revelations about the inner life of an infj (introvert, intuitive, feeling, judging) heyoka (hyper empath) hsp (highly sensitive person)

What is the INFJ's "Door Slam", why does it happen, and how to recover from it (if possible)?

The infamous INFJ's Door Slam explained, with the triggers, the facts, alongside the long-term perspectives and consequences of such an extreme.