Reporter Info
Actual Issue
In the libreoffice writer the tabulator ruler is just black. And in libreoffice draw the ruler as well as the background of the preview panel are just black. See the following screenshots:
libreoffice writer:

libreoffice draw:

I applied this workaround https://github.com/nana-4/materia-theme/issues/122#issuecomment-543731136
This works so far. But it is just a workaround and not a fix. Will this be fixed in the theme or has this been reported to libreoffice upstream?
Thanks for the report.
This seems to have happened due to our recent changes. I'll fix this as soon as possible.
Same here this is in LibreOffice Writer the Option/Color menu

Just in case the info is useful, this is happening in the Calc formula box too:

Most helpful comment
Thanks for the report.
This seems to have happened due to our recent changes. I'll fix this as soon as possible.