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)

}
    const style = toStyle(this, "font", "margin", "visibility");
    switch (this.placement) {
      case "left":
      case "right":
        if (this.reserve > 0) {
          style.width = measureToString(this.reserve);
        }
        break;
      case "top":
      case "bottom":
        if (this.reserve > 0) {
          style.height = measureToString(this.reserve);
        }
        break;
    }
    setPara(this, null, value);
    this[$popPara]();
    this.reserve = savedReserve;
    return HTMLResult.success({
      name: "div",
      attributes: {
        style,
        class: ["xfaCaption"],
      },
      children,
    });
  }
}
class Certificate extends StringObject {