[DocumentViewer] Printing becomes inactive after loading txt file

MacOS 14.4.1

Qt Creator 13.0.0

Qt 6.7.0/6.7.1

Steps to reproduce:

1. Open document viewer example.
2. Open any txt file.
3. Check the printer icon and option -> printing available.
4. Open any other txt file
5. Check the printer icon and option -> printing inactive 

Expected: Printing should be available.

Actual: Printing is disabled, but after cutting out the text, writing some characters and pasting the content it's enabled and I can print the whole file. 

Reproducibility:  100%