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.

const { eventBus, pdfFindController } = await initPdfFindController();
    await testSearch({
      eventBus,
      pdfFindController,
      state: {
        query: "conference",
        findPrevious: true,
      },
      matchesPerPage: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5],
      selectedMatch: {
        pageIndex: 13,
        matchIndex: 4,
      },
    });
  });
  it("performs a case sensitive search", async function () {
    const { eventBus, pdfFindController } = await initPdfFindController();
    await testSearch({
      eventBus,
      pdfFindController,
      state: {
        query: "Dynamic",
        caseSensitive: true,
      },
      matchesPerPage: [3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 3],
      selectedMatch: {
        pageIndex: 0,
        matchIndex: 0,