ColorPicker perform not as expected

[shyakocat]

By default, using System.Windows.Media.Color as property report Cannot find resource named "ColorPicker".

That's fine, I force Color to use a custom editor, it solved (code below).

But the tab header show nothing, and I cannot slide the R/G/B/A params, and the layout is weird, and I cannot choose color apart from black (in advance panel).

Am I do a wrong setting? (C# WPF, nuget, Extended.Wpf.Toolkit 4.5.0)

[shyakocat]

I'm sorry for that I didn't check the real reason.
I use samoatesgames/mui.extended.toolkit and its code is old for current wpf toolkit version, so I add a git submodule and modify the source code to fix the problem.