Please check RecognitionMode enumeration, it seems you are using TextBox so it converts PDF to DOCX in form of text boxes to preserve maximum formatting. Please use Flow in your code which keeps the flow of original document. If you still face any problem then please share SSCCE code so that we may investigate further.
We have logged a ticket with ID PDFCPP-1148 in our issue management system for further investigations. We will let you know as soon as any significant update will be available in this regard.
It is good to know that your issue has been resolved. Please keep using our API and in case you need further assistance, please feel free to let us know.