Create a Formula object (Insert → Object → Formula Object) in Writer when using Dark Mode (either on Windows with current master, or on Linux), and see how the black text in the embedded object is not visible on the Writer's dark page background.
Created attachment 179447 [details]
Screenshot from https://ask.libreoffice.org/t/formula-is-invisible-because-its-black-in-writer-dark-mode/76316/3
*** Bug 148674 has been marked as a duplicate of this bug. ***
I do confirm, It is soooo annoying :-(
On both my linuxes it's impossible to change it.
Or I wasn't able to find out how to get rid of it...