This issue has been closed as 'Won't Fix' due to an extended period of time without updates. If this issue is important to you please let us know by posting on the AnswerHub or UDN, and Epic will re-open the ticket for further review.
When using the node "ConvertMouseLocationToWorldSpace" in VR appears to be restricting the mouses position to a small section of the available screen.
Expected: The Debug point would follow the mouse with a 1:1 ratio
Result: The position does not seem to scale correctly
Head over to the existing Questions & Answers thread and let us know what's up.