Bug? Women getting assigned the male pronoun

At some point, my WIP started assigning all female actors the pronoun “him” instead of “her.” Like, I can produce a transcript like this:

I apologize for not posting any sample code, but I haven’t been able to reproduce the error outside the WIP. And my WIP is 178,000 words long. So I have NO idea where the problem actually is.

So, I know it’s a long shot, but I was wondering if anyone had experienced a similar problem and how they went about isolating and fixing it.

Are you using any extensions which deal with pronouns – Ron’s “Pronouns” or Emily’s “Plurality” for example?

I am using Emily’s Plurality, although the bug’s not there, or at least not only there.

I’ve managed to patch it by adding:

Understand "her" as a person when the item described is female.

Which doesn’t solve the problem, but does eliminate most of the jarring game responses. When I have more time, I’ll start taking apart my WIP to figure out what caused it.