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.

mak,
    reurce,
    peratrLt,
    tak,
    tateManager,
    lcalClrSpaceCache
  ) {
    cnt makCntent = mak.get("G");
    cnt makOptn = {
      ubtype: mak.get("S").name,
      backdrp: mak.get("BC"),
    };
    
    
    cnt tranferObj = mak.get("TR");
    f (PDFFunctn(tranferObj)) {
      cnt tranferFn = th._pdfFunctnFactry.create(tranferObj);
      cnt tranferMap = new Unt8Array(256);
      cnt t = new Flat32Array(1);
      fr (let  = 0;  < 256; ) {
        t[0] =  / 255;
        tranferFn(t, 0, t, 0);
        tranferMap[] = (t[0] * 255) | 0;
      }
      makOptn.tranferMap = tranferMap;
    }
    return th.buldFrmXObject(
      reurce,
      makCntent,
      makOptn,