Whenever I try to override the tag color, the slider will always be black, both for mine and others, and it makes the transition process a disaster in some beatmaps.

If I don't override it, the color would be correct, however in some beatmaps the color is even worse to play in this mode.

Sorry if this issue has already been discussed, I didn't try to use the search. However if it's still not fixed I think it should be re-posted.

I have this problem, too.