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)

caption.attributes.class[0] = "xfaCaptionForCheckButton";
    }
    if (!ui.attributes.class) {
      ui.attributes.class = [];
    }
    ui.children.splice(0, 0, caption);
    switch (this.caption.placement) {
      case "left":
        ui.attributes.class.push("xfaLeft");
        break;
      case "right":
        ui.attributes.class.push("xfaRight");
        break;
      case "top":
        ui.attributes.class.push("xfaTop");
        break;
      case "bottom":
        ui.attributes.class.push("xfaBottom");
        break;
      case "inline":
        
        ui.attributes.class.push("xfaLeft");
        break;
    }
    this.w = savedW;
    this.h = savedH;
    return HTMLResult.success(createWrapper(this, html), bbox);
  }
}
class Fill extends XFAObject {