Broken achievement / Trophies
"Part 11: As Shadows Fall" - this refuses to unlock after I've beated the game with everyone alive, so I've progressed well past this story point and it is still locked. I've replayed the chapter 3x.
"The Light in the Dark" - Ive replayed the second quest on this questline twice, where flowers become accessible. I've even unlocked the "In Peace" achievement, which is only accessible by completing the requirements for "The Light in the Dark".
Please review how achievements unlock because others were buggy as well, but these two are the most stubborn.
I did complete this game 100%, but only after doing "Part 11" 4 times, but "Light in the Dark" took:
1) An uninstall
2) Deletion of my LOCAL saves
Then it popped on my first attempt after downloading the game again and resyncing my Xbox Cloud saves.
Edit: Not a fun "solution" or necessarily going to work for you, did I did want to update each of you as this did work for me.
