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)




const bounds = boxes.map(function (box, i) {
    return {
      x1: box.left,
      y1: box.top,
      x2: box.right,
      y2: box.bottom,
      index: i,
      x1New: undefined,
      x2New: undefined,
    };
  });
  expandBoundsLTR(width, bounds);
  const expanded = new Array(boxes.length);
  for (const b of bounds) {
    const i = b.index;
    expanded[i] = {
      left: b.x1New,
      top: 0,
      right: b.x2New,
      bottom: 0,
    };
  }
  
  
  boxes.map(function (box, i) {
    const e = expanded[i],
      b = bounds[i];
    b.x1 = box.top;