Interactions in the Menu are not working as expected in VRTemplate

Interactions in the Menu on VRTemplate (and I suspect that style of menu interaction in general) do not function as expected. This issue was reproduced several times (5/5), both with a VR headset and on PC by using a mouse to hover. This issue was not reproduced in 5.0.3, making it a regression.

Buttons are not the only thing that is not interacting as expected in the Menu. If a user adds a slider, and attempts to use it by grabbing the actual slider and moving it across it does not work. The user has to "click"/grab at varying points on the actual slide to have the slider move there.

1. Open UE
2. Create a VR Template project and open it
3. PIE and open the menu
4. Hover over the buttons in the menu and then click one (such as Reset Orientation)
5. Click the button again and hover over the buttons as doing so

Result: Two or more buttons end up highlighted at the same time
Expected: Only the button that is being hovered over should be highlighted