There doesn't appear to be any obvious issues with the parsing of the file and the shapes array is ready to paint with properly mapped characters. The font is question is a CID font and there appears to be a lot of white space used to control layout. My best guess is that we aren't handling the white space correctly and throwing the layout off.

Some improvements in rendering for 4.3.3 but still some more work to complete.

After quite a lot of debuging and false positives I might have finally addressed a long running issue with how we apply text scaling to text. The new approach only applies the horizontal scaling when at text showing operator is applied, TJ, Tj, ' and ". And once the string is drawn the CTM is restored to the pre horizontal scalling affine transform. This technique avoid numerous calls to applyTextScalling() in the previous implementation.
Still a round of QA work to do but feel pretty confident with the fix.

Marking as resoloved. Will open again if QA proves otherwise.