O's and G's have disappeared on DC PDF converted Word doc

[#1]

Help, it seems that after converting a PDF to word the O's and G's have disappeared.

Is there an easy fix to this ???

[#2]

How did you convert and what are the fonts used?

[#3]

Converted using PDF to word in DC but the originally in the Pdf fint files main boady of text was Avenir Roman the  conversion version was Arial

[#4]

Hello, 

Would you mind sharing your PDF file with? I would like to take a look at that file.

~Tariq

[#5]

Does this happen also with an own document? Like you have a Word file, convert to PDF and convert back to Word.