Starting a new game with UFO4P breaks Nuka-World NPC's, dialog and quests.
First noticable example is being unable to talk to NIRA or any market traders except for Mackenzie.
How to reproduce this bug: Using only UFO4P and F4SE installed, start a new game, choose between Nate/Nora and just player.moveto NIRA. She won't have any dialog interactions with the player.
Without UFO4P and starting a new game, everything works fine. Test this with player.moveto NIRA. NIRA will greet the player correctly.
NO OTHER MODS WERE USED. ONLY UFO4P AND F4SE.
The only way around this issue is starting a new game without UFO4P. If you install UFO4P AFTER you start a new game and save, everything should work properly. Again, this bug occurs if you start a new game WITH UFO4P installed.
Before you say something like player.moveto causes w/e un-intended effects, I also progressed to Nuka-World by normal means and had the same problem (which is how I ran into the problem in the first place).
All topic related to this bug:
Was reported, but someone said it wasn't an issue... even though there are literally dozens of players having the same exact issue. Mackenzie being the only interactable NPC, NIRA has no dialog, blah blah.