Can't print or correctly export certain fields in a writer or draw file.

I created a draw document, where i inserted a field that is connected and takes data from a query in a libreoffice database file. That field from the query has Greek letters and numbers.

I can see the content of that field (letters and numbers) in my screen when i’m editing the draw file, but when i’m printing it i take a white page. Also when i’m exporting it in a .pdf file, i can see only the numbers that contains the field but not the letters.

I’m attaching a print screen and a pdf file. I tried the above also in a writer file, with the same outcome.

Any suggestions why i can’t print that file in a printer or export it correctly in a pdf file?

I’m using LibreOffice 10(Build:1) in linux 4.9.0-8-686-pae #1 SMP Debian 4.9.144-3.1 (2019-02-19) i686 GNU/Linux