Attach (recommended) or Link to PDF file here:
[arcs.pdf](https://github.com/mozilla/pdf.js/files/7610486/arcs.pdf)

Configuration:
- Web browser and its version: 96.0a1 (2021-11-26) (64-bit)
- Operating system and its version: Windows 10
- PDF.js version:
- Is a browser extension:

Steps to reproduce the problem:
1. Open PDF

What is the expected behavior? (add screenshot)
Arcs are drawn correctly, and can render on top of each other
![image](https://user-images.githubusercontent.com/7104454/143624981-1a45c37a-bc30-4b64-893a-684da9cdfe3b.png)

What went wrong? (add screenshot)
![image](https://user-images.githubusercontent.com/7104454/143624965-5506df08-3510-4e60-908f-d64499050660.png)

Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension):

if (this.exData) {
      if (typeof this.exData[$content] === "string") {
        return this.exData[$content].trim();
      }
      return this.exData[$content][$text]().trim();
    }
    for (const name of Object.getOwnPropertyNames(this)) {
      if (name === "image") {
        continue;
      }
      const obj = this[name];
      if (obj instanceof XFAObject) {
        return (obj[$content] || "").toString().trim();
      }
    }
    return null;
  }
  [$toHTML](availableSpace) {
    for (const name of Object.getOwnPropertyNames(this)) {
      const obj = this[name];
      if (!(obj instanceof XFAObject)) {
        continue;
      }
      return obj[$toHTML](availableSpace);
    }
    return HTMLResult.EMPTY;
  }
}
class Variables extends XFAObject {