Attach (recommended) or Link to PDF file here:
[Scan-to-Mail-PDF1_(1).pdf](https://github.com/mozilla/pdf.js/files/6876708/Scan-to-Mail-PDF1_.1.pdf)

Configuration:
- Web browser and its version: Firefox Developer 91.0b7 (64-Bit)
- Operating system and its version: Windows 10 (21H1)
- PDF.js version: 2.10.339 (also tested with the online demo, Version 2.11.5)
- Is a browser extension:

Steps to reproduce the problem:
1. Open the attached pdf
2. Scroll to page 3

What is the expected behavior? (add screenshot)
![image](https://user-images.githubusercontent.com/7944797/126957487-cc7a2d19-adfb-42e4-9809-74e1a7a85048.png)

What went wrong? (add screenshot)
![image](https://user-images.githubusercontent.com/7944797/126957351-29aebb4d-eadd-4273-b69d-530b9060c12c.png)




return this._transport.getDocJSActions();
  }
  /**
   * @typedef {Object} OutlineNode
   * @property {string} title
   * @property {boolean} bold
   * @property {boolean} italic
   * @property {Uint8ClampedArray} color - The color in RGB format to use for
   *   display purposes.
   * @property {string | Array<any> | null} dest
   * @property {string | null} url
   * @property {string | undefined} unsafeUrl
   * @property {boolean | undefined} newWindow
   * @property {number | undefined} count
   * @property {Array<OutlineNode>} items
   */
  /**
   * @returns {Promise<Array<OutlineNode>>} A promise that is resolved with an
   *   {Array} that is a tree outline (if it has one) of the PDF file.
   */
  getOutline() {