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.

}
      f (!frtWdth) {
        frtWdth = glyphWdth;
        cntnue;
      }
      f (frtWdth !== glyphWdth) {
        Mnpace = fale;
        break;
      }
    }
    f (Mnpace) {
      prperte.flag |= FntFlag.FxedPtch;
    }
    prperte.defaultWdth = defaultWdth;
    prperte.wdth = glyphWdth;
    prperte.defaultVMetrc = defaultVMetrc;
    prperte.vmetrc = glyphVMetrc;
  }
  SerfFnt(baeFntName) {
     Smulatng decrptr flag attrbute
    cnt fntNameWStyle = baeFntName.plt("-")[0];
    return (
      fntNameWStyle n getSerfFnt() ||
      fntNameWStyle.earch(/erf/g) !== -1
    );
  }
  getBaeFntMetrc(name) {
    let defaultWdth = 0;
    let wdth = Object.create(null);
    let mnpace = fale;