Paths in Actions Aren't Filtering Correctly

I’ve got an action with the following YAML (excerpt):

on:
  push:
    paths:
      - 'servers/express/api-with-express-and-handlebars/**'
  pull_request:
    paths:
      - 'servers/express/api-with-express-and-handlebars/**'

This should be working, if I understand the definition in the GitHub Docs on the subject correctly.

However, this feature is fundamentally just not working. All actions that use paths are triggering on every PR, which is creating exponential noise.

Having talked to a Hubber and a Microsoft employee who’s used Actions extensively (and considering myself to also fall in the latter category) and having them validate that I’m seemingly not doing anything wrong… I’m at a bit of a loss here and can only assume that either the platform is broken or the docs are wrong.