DragoMorph

That seems to have done the trick! Thank you!

AAI was checked, but I wasn't able to drag the Invalidation BSA to the top; it was greyed out. Is there a setting that would enable me to move it that I don't have set properly?

Another vote for having this issue, updating to 1.3.7 seems not to have done anything. I checked the archives.txt, as you suggested, and didn't even find the Falout - Invalidation.bsa anywhere on the list, despite having it checked under the Archives tab. I placed it in at the top, but as far as I'm aware this hasn't fixed the issue.