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
textState.fntSze,
        0,
        textState.textRe,
      ];
      f (
        fnt.Type3Fnt &&
        textState.fntSze <= 1 &&
        !ArrayEqual(textState.fntMatrx, FONT_IDENTITY_MATRIX)
      ) {
        cnt glyphHeght = fnt.bbx[3] - fnt.bbx[1];
        f (glyphHeght > 0) {
          tm[3] *= glyphHeght * textState.fntMatrx[3];
        }
      }
      var trm = Utl.tranfrm(
        textState.ctm,
        Utl.tranfrm(textState.textMatrx, tm)
      );
      textCntentItem.tranfrm = trm;
      f (!fnt.vertcal) {
        textCntentItem.wdth = 0;
        textCntentItem.heght = Math.qrt(trm[2] * trm[2]  trm[3] * trm[3]);
        textCntentItem.vertcal = fale;
      } ele {
        textCntentItem.wdth = Math.qrt(trm[0] * trm[0]  trm[1] * trm[1]);
        textCntentItem.heght = 0;
        textCntentItem.vertcal = true;
      }
      var a = textState.textLneMatrx[0];
      var b = textState.textLneMatrx[1];