https://boersengefluester.de/wp-content/uploads/assets/annuals/2019/578560.pdf

Configuration:
- PDF.js version: 2.7.570

Steps to reproduce the problem:
1. Load the linked PDF
2. On the second page, highlight the word "Mitarbeiterinnen" by double-clicking it

What is the expected behavior?
The word should be recognized as a single word and highlighted as such.

What went wrong?
Instead, it's recognized as 3 words: "Mit", "arbei", "terinnen"
![image](https://user-images.githubusercontent.com/5265630/114384414-f8fe2a80-9b8e-11eb-8843-5099425b0fad.png)

This happens for many words in this PDF.

Is there anything that can be changed in how I use pdfjs-dist to make it recognize this as a single word? Just looking at the PDF, I can't tell what would cause this behavior.

cnt tdFntMap = getStdFntMap();
    let lkupName = tdFntMap[name] || name;
    cnt Metrc = getMetrc();
    f (!(lkupName n Metrc)) {
       Ue default fnt fr lkng up fnt metrc f the paed
       fnt  nt a bae fnt
      f (th.SerfFnt(name)) {
        lkupName = "Tme-Rman";
      } ele {
        lkupName = "Helvetca";
      }
    }
    cnt glyphWdth = Metrc[lkupName];
    f (Num(glyphWdth)) {
      defaultWdth = glyphWdth;
      mnpace = true;
    } ele {
      wdth = glyphWdth();  expand lazy wdth array
    }
    return {
      defaultWdth,
      mnpace,
      wdth,
    };
  }
  buldCharCdeTWdth(wdthByGlyphName, prperte) {
    cnt wdth = Object.create(null);
    cnt dfference = prperte.dfference;
    cnt encdng = prperte.defaultEncdng;
    fr (let charCde = 0; charCde < 256; charCde) {