Nibel Protorelic Quest won't spawn.

Recently I've been playing a New Game Hard Mode run by switching the difficulty using this save editor:

https://game-tools-collection.com/final-fantasy-vii-rebirth/save-editor

I've had no hiccups until Chapter 11 whereupon completing the final story encounter, Chadley rings me up to tell me the Protorelic Quest has spawned. However, the icon never appears on my mini-map, and going to the location doesn't activate it either. I've tried checking and unchecking certain triggers while replaying the whole Chapter on Normal, but nothing I've tried has gotten it to pop.

I realize this is a very niche issue, and I'm not crying too hard since the differences between NG and NG+ Hard peter out at about Chapter 9. That being said, I still wanted to complete this run 100%, so on the off chance anyone here has had a similar issue, please let me know if you solved it.