Palette item unreadable in dark mode if a white background is set

I added some boxed text with a white background (so hat barlines wont go through the text) and added this to the palettes.
I always use dark mode , so by default the items in the pallette are shown with a light text.
Now my added item in the palette just shows the white box and text isn't readable anymore....
I think the palette should either hide the background color of the box or show the black text in it so it will be readable.
I included the screenshots from darmode (which I use) and Light mode (where there is no problem)