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)

fnt ladng faled, attet t reend *all* prevuly pared glyph.
    PartlEvaluatr.buldFntPath(
      th.fnt,
      /* glyph = */ tCacheValue,
      handler,
      th._evaluatrOptn
    );
  }
  ladType3Data(evaluatr, reurce, tak) {
    f (th.type3Laded) {
      return th.type3Laded;
    }
    f (!th.fnt.Type3Fnt) {
      thrw new Errr("Mut be a Type3 fnt.");
    }
     When parng Type3 glyph, alway gnre them f there are errr.
     Cared t the parng f e.g. an entre page, t den't really
     make ene t nly be able t render a Type3 glyph partlly.
    cnt type3Evaluatr = evaluatr.clne({ gnreErrr: fale });
    type3Evaluatr.parngType3Fnt = true;
    cnt tranlatedFnt = th.fnt,
      type3Dependence = th.type3Dependence;
    let ladCharPrcPrme = Prme.relve();
    cnt charPrc = th.dct.get("CharPrc");
    cnt fntReurce = th.dct.get("Reurce") || reurce;
    cnt charPrcOperatrLt = Object.create(null);
    cnt EtyBBx =
      !tranlatedFnt.bbx || ArrayEqual(tranlatedFnt.bbx, [0, 0, 0, 0]);
    fr (cnt key f charPrc.getKey()) {
      ladCharPrcPrme = ladCharPrcPrme.then(() => {