No tessellation in Vulkan Desktop renderer

I have quite a few different materials with different tessellation techniques in them(both paid for off marketplace and own code), they work fine on DX11 sm 5.0 but as soon as i switch to vulkan desktop sm 5.0 there is 0 tessellation.

The massive gains in performance for Vulkan over DX11 for my Amd RX 570 GPU makes it really attractive, but i can’t use it for my project if there is no tessellation support.

The attached image shows tessellation is supported by the Vulkan desktop renderer, but for the life of me i cant get it to work.
I have also tested in a new project with the same results, Is there something i’m missing? is it not really supported?