I seem to have lost this feature, dating back even to VEP 6.
Presently, with a Logic window highlighted, pressing the Space bar will start and stop the playhead. And the VEP 7 server window's play icon (the triangle facing right) highlights and un-highlights accordingly.
But if the VEP 7 window is selected, clicking the play icon does not affect Logic. It only turns the icon on and off. And with the VEP 7 window selected, hitting Space does nothing at all.
If I double-click on some VEP text and hit Space, it will enter a space, so I know the command is getting through. Also, COMMAND R will toggle the Audio Engine. But Space does nothing.
I'm on an ancient Mac -- early 2008 -- running Mojave with patch software.