If you watched my last video you might have noticed the reason VA did not register my first "both" command is because I didn't allow enough silence before the command. I believe the default is 2 seconds. Don't know if you can change that, going to check. Also, setting it to take commands via ptt does not reduce that requirement.
Just tested. It is as I thought. Even if you use a ptt it is still listening when your ptt is not pressed. It just doen't process commands unless the ptt is pressed. Looks like no way around the prefaced silence requirement.