INTP tends to be overly curious about the world and sense making. Exploration is a creative act for them and travel the easy path to it. INTJ shifts knowledge to perspectives of others combined with functional intelligence
This seems to be one of the most common P/J flips (which overall is rare), accessible because the skill sets are so similar and compulsions are too introverted to be highly reinforced through outward behaviors
...and then the natural next move is for an INTJ to effectively become an ENTJ, weaponizing their understanding of others to win the video games of life