Any official guide on how to set custom title bar while disable resizing?

[JohnCido]

I'm currently using the following combination to achieve the goal:

// Set the customize title bar
ExtendsContentIntoTitleBar = true;
SetTitleBar(DraggableArea);

// Disable resize
AppWindowPresenter.IsResizable = false;
AppWindowPresenter.IsMaximizable = false;
AppWindowPresenter.IsMinimizable = false;
AppWindowPresenter.SetBorderAndTitleBar(true, false);

But this setup introduces a weird bug, a black line with the thickness of 1 appears at the top of the app window. When I hover my cursor over it, I was able to resize the window vertically

It seems that I should not use ExtendsContentIntoTitleBar, but SetTitleBar() won't work without it.

So is there any official solution to this?