VR image problems when pressing pause

When in VR and pressing the escape key to pause, the VR image freezes/wobbles or goes black for about a minute, then restarts. The pause menu does not appear.

The only way to get the pause menu is to exit VR and then press pause.

I’m using the SU7 hotfix beta, but I think this started before the beta was installed.

Reverb G2, Windows 10, Nvidia 457.30, Steam