VR Preview multiplayer in editor windows show same view

Before we updated to Unreal 4.25, when using VR Preview with number
of players > 1, only one window would show the VR view. The other
window(s) showed the view from other players.

Now  this no longer happens. If I play with 2 players, both
windows show the view from the VR headset. So it is no longer possible
to see what the 2nd player sees when you are using VR Preview.

I assumed that this was something that broke in Unreal between 4.24 and 4.25, but when I posted to the UDN forums, they pointed out that 4.24 has this same behavior now, and that the problem likely originated in an Oculus SDK update.

So - anyone know when / why that changed?  Is there any way to restore that functionality?