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 (!prperte.cte && prperte.haEncdng) {
        prperte.fallbackTUncde = th._buldSleFntTUncde(
          prperte
        );
      }
      return Prme.relve(prperte.tUncde);
    }
    
    
    
    
    
    f (!prperte.cte ) {
      return Prme.relve(th._buldSleFntTUncde(prperte));
    }
    
    
     d
     A
    f (
      prperte.cte &&
      ((prperte.cMap.bultInCMap &&
        !(prperte.cMap ntancef IdenttyCMap)) ||
        (prperte.cdSytemInf.regtry === "Adbe" &&
          (prperte.cdSytemInf.rderng === "GB1" ||
            prperte.cdSytemInf.rderng === "CNS1" ||
            prperte.cdSytemInf.rderng === "Japan1" ||
            prperte.cdSytemInf.rderng === "Krea1")))
    ) {
       T