I really wish I could fix it.
I haven't stopped trying, but it's really demotivating when I can't even recreate it. I have no leads other than maybe scripting is causing it.
And it's also really hard to playtest because I've done it so much before that I get so bored of it. I just want the frickin' bug to show up. It's shown up once before I released Update Aphelion, and I don't know how I fixed it.
I'll have to borrow someone elses computer maybe and play it there.
Maybe as the mod creators of Custom NPC mod seeing as the bug sees to me with that mod, maybe they might be able to help.