Hey Ted,
I looked into this issue a bit and here is what I have been informed of. Slate is a 2D UI solution and the Oculus is not designed to work with HUD UI solutions that appear in the foreground. When working with VR devices, the best practice is to use 3D mesh objects as your UI or 3D UMG widgets. Humans do not naturally have images “within” their eyes as the Oculus renders it, which increases sim sickness. Due to this, we are not focusing our efforts to make Slate UI more compatible with the Oculus at this time.
Let me know if you have any additional questions
Thanks!