Attach (recommended) or Link to PDF file here:
[FormDB2_fr.pdf](https://github.com/mozilla/pdf.js/files/7352426/FormDB2_fr.pdf)

Configuration:
- Web browser and its version: Firefox nightly
- Operating system and its version: linux debian

Steps to reproduce the problem:
1. Open the pdf
2. The image on the top of each pages is missing 

What is the expected behavior? (add screenshot)
![image](https://user-images.githubusercontent.com/5641725/137465500-e8788893-f33d-4532-871d-43b464fa85f4.png)

What went wrong? (add screenshot)
![image](https://user-images.githubusercontent.com/5641725/137465363-f2b35fe4-6776-45e9-b9e4-ccef6d9ad670.png)

? getMeasurement(attributes.spaceAbove, "0pt")
      : "";
    this.spaceBelow = attributes.spaceBelow
      ? getMeasurement(attributes.spaceBelow, "0pt")
      : "";
    this.tabDefault = attributes.tabDefault
      ? getMeasurement(this.tabDefault)
      : "";
    this.tabStops = (attributes.tabStops || "")
      .trim()
      .split(/\s+/)
      .map((x, i) => (i % 2 === 1 ? getMeasurement(x) : x));
    this.textIndent = attributes.textIndent
      ? getMeasurement(attributes.textIndent, "0pt")
      : "";
    this.use = attributes.use || "";
    this.usehref = attributes.usehref || "";
    this.vAlign = getStringOption(attributes.vAlign, [
      "top",
      "bottom",
      "middle",
    ]);
    this.widows = getInteger({
      data: attributes.widows,
      defaultValue: 0,
      validate: x => x >= 0,
    });
    this.hyphenation = null;
  }
  [$toStyle]() {