Attach (recommended) or Link to PDF file here:
See pdf in https://github.com/mozilla/pdf.js/issues/3109

Configuration:
- Web browser and its version: Firefox nightly
- Operating system and its version: Windows 10
- PDF.js version: builtin viewer

Steps to reproduce the problem:
1. Look at outlines

What is the expected behavior? (add screenshot)
![image](https://user-images.githubusercontent.com/5641725/141514798-0e656865-1cbf-4fb8-a89b-530d36da23c9.png)

What went wrong? (add screenshot)
![image](https://user-images.githubusercontent.com/5641725/141514740-c95e0237-8bf4-4129-a4a5-cb2ea5a3f4df.png)

const loadingTask = getDocument(buildGetDocumentParams("issue13226.pdf"));
      const pdfDoc = await loadingTask.promise;
      const pdfPage = await pdfDoc.getPage(1);
      const { items } = await pdfPage.getTextContent();
      const text = mergeText(items);
      expect(text).toEqual(
        "Mitarbeiterinnen und Mitarbeiter arbeiten in über 100 Ländern engagiert im Dienste"
      );
      await loadingTask.destroy();
    });
    it("gets text content, with merged spaces (issue 13201)", async function () {
      const loadingTask = getDocument(buildGetDocumentParams("issue13201.pdf"));
      const pdfDoc = await loadingTask.promise;
      const pdfPage = await pdfDoc.getPage(1);
      const { items } = await pdfPage.getTextContent();
      const text = mergeText(items);
      expect(
        text.includes(
          "Abstract. A purely peer-to-peer version of electronic cash would allow online"
        )
      ).toEqual(true);
      expect(
        text.includes(
          "avoid mediating disputes. The cost of mediation increases transaction costs, limiting the"
        )
      ).toEqual(true);
      expect(
        text.includes(
          "system is secure as long as honest nodes collectively control more CPU power than any"
        )