#thread.archived returning incorrect boolean — Page 1

I'm using the threadUpdate event to check when a forum post gets automatically archived. I then compare oldThread and newThread to check if it has gotten archived:

  name: "threadUpdate",
  async execute(oldThread, newThread) {
    if (oldThread.archived === newThread.archived) return;
    if (newThread.archived === true) {
      //do stuff
    }
  }
}```
Sometimes the bot just execute what's inside the if even if it's not archived, sometimes even after a new message in an active post.

How is that even possible? Is there something I'm missing?

node: v18.12.1