I have attached a .xlsx file, which contains a waterfall chart. The font text within the waterfall itself is white in Microsoft Excel but it is black when opened in OnlyOffice 9.3.1, which is difficult to read.
UPDATE: I have now filed a bug report on github for this: Wrong font colour in chart imported from Excel · Issue #2325 · ONLYOFFICE/DesktopEditors · GitHub
funnel.xlsx (12.7 KB)