LibreOffice developers decided to drop support for Type 1 fonts in LibreOffice 5.3 and newer, see https://bugs.documentfoundation.org/show_bug.cgi?id=104701. This means that URW Type 1 fonts provided by urw-fonts-2.4-7.mga6 are no longer usable. As Mageia 6 already provides LibreOffice 5.3, the urw-fonts package should also include TrueType (and/or OpenType) fonts to not break the format of documents written with LibreOffice 5.2 and older and using these fonts. These TTF and ODF fonts are available from here:
Either that or create a new fonts-ttf-urw package. :)
Assigning to all packagers collectively, since there is no registered maintainer for this package.
Thanks for the report. They should be added in a new package. I also have an update for urw-fonts halfway done that I never finished. Maybe I will some day.