This is also affecting my game. Same scenario exactly. Changed difficulty to Storied, then changed back to Fabled and the Devourer disappeared leaving me unable to defeat the portal and move forward in the story.
Edit: Forgot to mention, this happened on PS5
This is also affecting my game. Same scenario exactly. Changed difficulty to Storied, then changed back to Fabled and the Devourer disappeared leaving me unable to defeat the portal and move forward in the story.
Edit: Forgot to mention, this happened on PS5