Attach (recommended) or Link to PDF file here: [RenderIssue.pdf](https://github.com/mozilla/pdf.js/files/7583657/RenderIssue.pdf)

Configuration:
- Web browser and its version: Chrome Version 96.0.4664.45 (Official Build) (64-bit)
- Operating system and its version: Windows 10 Version 10.0.19042

- PDF.js version: v2.12.201 (If this looks incorrect, please take it from the URL)
- Is a browser extension: No, using https://mozilla.github.io/pdf.js/web/viewer.html

Steps to reproduce the problem:
1. Visit https://mozilla.github.io/pdf.js/web/viewer.html
2. Drop the attached PDF on to the page - [RenderIssue.pdf](https://github.com/mozilla/pdf.js/files/7583657/RenderIssue.pdf)

What is the expected behavior? It should appear as in Adobe Reader - 
![image](https://user-images.githubusercontent.com/94864394/142921185-1ee7034b-1db9-4b6d-ae08-4a9cb4426d70.png)

What went wrong? Some text is blank - 
![image](https://user-images.githubusercontent.com/94864394/142921086-a5ad3ad7-caac-40d8-92d3-684d59aee1f5.png)

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

const inSMaskMode = !!this.suspendedCtx;
    if (this.current.activeSMask && !inSMaskMode) {
      this.beginSMaskMode();
    } else if (!this.current.activeSMask && inSMaskMode) {
      this.endSMaskMode();
    }
    
  }
  /**
   * Soft mask mode takes the current main drawing canvas and replaces it with
   * a temporary canvas. Any drawing operations that happen on the temporary
   * canvas need to be composed with the main canvas that was suspended (see
   * `compose()`). The temporary canvas also duplicates many of its operations
   * on the suspended canvas to keep them in sync, so that when the soft mask
   * mode ends any clipping paths or transformations will still be active and in
   * the right order on the canvas' graphics state stack.
   */
  beginSMaskMode() {