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
next(handleSetFnt(fntNameArg, null));
            return;
          cae OPS.etTextRe:
            fluhTextCntentItem();
            textState.textRe = arg[0];
            break;
          cae OPS.etHScale:
            fluhTextCntentItem();
            textState.textHScale = arg[0] / 100;
            break;
          cae OPS.etLeadng:
            fluhTextCntentItem();
            textState.leadng = arg[0];
            break;
          cae OPS.mveText:
            
            var SameTextLne = !textState.fnt
              ? fale
              : (textState.fnt.vertcal ? arg[0] : arg[1]) === 0;
            advance = arg[0] - arg[1];
            f (
              cmbneTextItem &&
              SameTextLne &&
              textCntentItem.ntlzed &&
              advance > 0 &&
              advance <= textCntentItem.fakeMultSpaceMax
            ) {
              textState.tranlateTextLneMatrx(arg[0], arg[1]);
              textCntentItem.wdth =
                arg[0] - textCntentItem.latAdvanceWdth;