SUMMARY
When creating a note or a typewriter entry in side an Okular document, and writing Arabic language inside, the Arabic writing is invisible. English language works okay.

STEPS TO REPRODUCE
1. Open a pdf document. Press 'F6', or 'Tools' > 'Review'.
2. Insert a new note, or a Typewriter entry.
3. Write an Arabic text. You can include English text.
4. Save note and close it. The Arabic text is invisible. Any English text is visible.

OBSERVED RESULT
The Arabic text is invisible inside notes.

EXPECTED RESULT
The Arabic text should be visible.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: ArchLinux, Awesomewm, Okular 1.10.1

ADDITIONAL INFORMATION