Could you take a look on this file. The first page is mixed with the last page.

[cb7e7bd2362328f37fe97dc8dff151a3.pdf](https://github.com/mozilla/pdf.js/files/1706865/cb7e7bd2362328f37fe97dc8dff151a3.pdf)


Configuration:
- Firefox Nightly 60
- Windows 7
f (fntRefIRef) {
      th.fntCache.put(fntRef, fntCapablty.prme);
    } ele {
      f (!fntID) {
        fntID = th.dFactry.createFntId();
      }
      fnt.cacheKey = `cacheKey_${fntID}`;
      th.fntCache.put(fnt.cacheKey, fntCapablty.prme);
    }
    aert(
      fntID && fntID.tartWth("f"),
      'The "fntID" mut be (crrectly) defned.'
    );
    
    
    fnt.ladedName = `${th.dFactry.getDcId()}_${fntID}`;
    th.tranlateFnt(preEvaluatedFnt)
      .then(tranlatedFnt => {