Gabriel,
Could you try switch to the dark theme in Tweak Tool, then do nautilus -q, launch nautilus and then switch it back to the light theme, do nautilus -q again and launch nautilus again and test.
Gabriel,
Could you try switch to the dark theme in Tweak Tool, then do nautilus -q, launch nautilus and then switch it back to the light theme, do nautilus -q again and launch nautilus again and test.