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)




for (const i in value) {
        let desc,
          p = value;
        while (!(desc = Object.getOwnPropertyDescriptor(p, i))) {
          p = Object.getPrototypeOf(p);
        }
        if (typeof desc.value === "undefined") {
          continue;
        }
        if (typeof desc.value === "function" && !value.hasOwnProperty?.(i)) {
          continue;
        }
        result[i] = cloneValue(desc.value);
      }
      return result;
    }
    const cloned = new WeakMap();
    const event = { data: cloneValue(obj) };
    this._deferred.then(() => {
      for (const listener of this._listeners) {
        listener.call(this, event);
      }
    });
  }
  addEventListener(name, listener) {
    this._listeners.push(listener);
  }
  removeEventListener(name, listener) {