Gauntlet of Strength

Hello, guys. So, i have a problem with gauntlet of strength not unlocking the final foe (the inner ones) In my first playthrough i did the the Shura ending, then the second playthrough the purification ending, and the third playthrough is the return ending. So i did all those ending with the respective boss in it defeated including Owl (Father) and Demon of Hatred but none of the three Gauntlet of Strength: Divine Heir, Shura, and Severance ( i still haven't unlock the mortal journey) inner boss unlocking despite that im already at fourth playthrough but in fourth playthrough i repeat the Shura ending because i thought thaw would unlock Inner Father, unfortunately it didnt. That is why im so pissed off right now.