Sentry not using JS source maps

I setup my server to only serve my JavaScript source maps if the X-Sentry-Token header exists with the correct value. I also used Postman to test it and make sure it worked. But my stack traces still show minified JS.

  1. What do I have to do to get Sentry to use my source maps?
  2. How can I tell if it even attempted to fetch them?
  3. Is there a way to debug the fetch if it failed?