Start a presentation with "Title,Content" slide. Write some lines in the content and shift the lines to different levels. Save the file. Open content.xml in an editor.
The font for the list symbols is "StarSymbol", but that font is not delivered by LibreOffice and not free available. So in most cases a font substitution will be made.
Request: Use a font, that is delivered by LibreOffice, if a font is needed at all.
Caolán had worked on these for bug 106515 and asked for a new bug if we thought it was an issue. Guess this is it.