I have the exact same problem as you and it’s really frustrating, as I’m using a blueprint asset from the store in my project which is only compatible with 4.17.
If I remove the render texture / scene capture, framerate jumps back to buttery smooth. As soon as it’s added back in, it’s judder central. I’ve tried playing about with all sorts of VR settings, but nothing will correct this issue for me. If you find any workaround, please let me know. I will report back here if I find a fix as well.
BTW - same project files in latest 4.16 works perfectly.