CSS Change username color for entire Custom Groups, works sometimes then doesn't?

I’m having the same problem too, I don’t know what’s wrong, impressive that even using the competent theme or the code, because the members’ names don’t change color, I even used the cogido and the component theme in a raw theme without any css or changes and it doesn’t change anything about the colors of the title

I just noticed something intriguing, if I put someone in the group as the owner, the change code works and the colors of the names of the members that I set as the owner are changed, but the members who are not the owners do not change

@Kartoon @Don @xebiyen