Attach (recommended) or Link to PDF file here:
[test.pdf](https://github.com/mozilla/pdf.js/files/6715502/test.pdf)

Configuration:
- Web browser and its version: Google Chrome Version 91.0.4472.114 
- Operating system and its version: Windows 10 Enterprise
- PDF.js version: 
- Is a browser extension: yes

Steps to reproduce the problem:
1. download file
2. open file



What is the expected behavior? (add screenshot)
show symbol
![image](https://user-images.githubusercontent.com/50500976/123409847-55ca8800-d5b7-11eb-9e5b-c7f3b33c00e1.png)

What went wrong? (add screenshot)
Does not show symbol
![image](https://user-images.githubusercontent.com/50500976/123409707-274cad00-d5b7-11eb-9a64-b11dcf3cdc3f.png)
Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension): Latest Version Chrome extension

encodingId === 1 &&
          (hasEncoding || !potentialTable)
        ) {
          useTable = true;
          if (!isSymbolicFont) {
            canBreak = true;
          }
        } else if (isSymbolicFont && platformId === 3 && encodingId === 0) {
          useTable = true;
          canBreak = true;
        }
        if (useTable) {
          potentialTable = {
            platformId,
            encodingId,
            offset,
          };
        }
        if (canBreak) {
          break;
        }
      }
      if (potentialTable) {
        file.pos = start + potentialTable.offset;
      }
      if (!potentialTable || file.peekByte() === -1) {
        warn("Could not find a preferred cmap table.");
        return {
          platformId: -1,
          encodingId: -1,