Is/When will Vsync be supported on UWP platforms?

With monogame 3.6 I get an exception trying to create the swapchain here

_swapChain = new SwapChain1(dxgiFactory2, dxgiDevice2, ref desc, null);

This only happens when I change the presentationInterval to immediate.

Would this require changing the monogame backend to sharpdx 4.01?

Any info would be greatly appreciated.

Due to window manager composition requirements and that UWP only supports windowed mode (fullscreen being a borderless window), sync is locked to the desktop refresh rate. Immediate mode does not fit with desktop composition.

I thought microsoft added support for turning off vsync for UWP games?