Saving mixer colors

I'm trying Musescore 3.0.1 for the first time making all my templates and setting everything as I want (that's why I've been using Musescore 2 until now) and it's impressive, better than I thought.

There's only one problem and I can't find any fix in the forum. When I save a template the colors asigned to each instrument in the new Mixer layout don't show when I use it. No matter what I try if I open the mixer in a sheet based on my custom template all the instruments are blue.

I'm posting this as a feature request since I think it's not a thing yet, sorry if there's any way that I couldn't fin in the forums or if you think it fit's better in the bugs section.