Elements font size is not preserved during export

I uploaded the file to MINERVA with font size = 20 mapa-font-20.xml.

Upload works ok, bigger font is displayed, but exporting to CellD makes the font default (size 12).
It may be caused by change of number format.

original CellD file <celldesigner:font size="20"/>

exported map to CellD <celldesigner:font size="20.0"/>