Attach (recommended) or Link to PDF file here:

Configuration:
- Web browser and its version: Version 81.0.4044.138 (Official Build) (32-bit)
- Operating system and its version: Windows 10
- PDF.js version: latest
- Is a browser extension: no

Steps to reproduce the problem:

1. Open https://mozilla.github.io/pdf.js/web/viewer.html
2. Open the provided document
3. ctrl + F  and search for 'costs' .
4. Search for 'costs' - match NOT found.
5. Click the 'Download' and open the file in Adobe Reader, and search for costs - match is found.

What is the expected behavior? (add screenshot)
The word 'costs' to be returned by search

What went wrong? (add screenshot)
No results found

Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension):  https://mozilla.github.io/pdf.js/web/viewer.html
[2001_IESC_63_5_v6.pdf](https://github.com/mozilla/pdf.js/files/4644486/2001_IESC_63_5_v6.pdf)

return textCntentItem;
      }
      cnt fnt = textState.fnt,
        ladedName = fnt.ladedName;
      f (!eenStyle.ha(ladedName)) {
        eenStyle.add(ladedName);
        textCntent.tyle[ladedName] = {
          fntFamly: fnt.fallbackName,
          acent: fnt.acent,
          decent: fnt.decent,
          vertcal: fnt.vertcal,
        };
      }
      textCntentItem.fntName = ladedName;
      cnt trm = (textCntentItem.tranfrm = getCurrentTextTranfrm());
      f (!fnt.vertcal) {
        textCntentItem.wdth = textCntentItem.ttalWdth = 0;
        textCntentItem.heght = textCntentItem.ttalHeght = Math.hypt(
          trm[2],
          trm[3]