Applying Libre Office White theme makes the menu-bar characters invisible when Gnome's Adwaita-dark theme is applied to the system.
Steps to Reproduce:
From menu-bar, Tools | Options | LibreOfficeDev | Personalization | Pre-installed themes, select White theme.
Contrast of menu-bar's characters compared to White theme not to be null.
User Profile Reset: Yes
version: https://gerrit.libreoffice.org/gitweb?p=core.git;a=log;h=73933ed0a207f1cf210cc4a7d329755bd885f871 | Tested on Fedora 33, Gnome v3.38.1 on Wayland.
Created attachment 166540 [details]
So don't use the White preinstalled theme with its *static* White PNG image header and footer with an os/DE theme that applies white/light gray fonts!
We'll assume that the see also bug 125217 for a replacement of the static area fills will actually respond to os/DE theming.