cannot debug in VR?

When I start my game in VR it works fine, until I hit a breakpoint. At this point the VR headset goes to the default vive background, and on my monitor, where I expect the event graph, I get a blank grey fullscreen.
What’s up with that?
4.16.1

Anyone else experiencing this, or not experiencing it?

Bump… 75 views, and not one of you use the debugger?

I can alt-tab into the blueprint with the break