Thanks but that doesn't answer my question. When I click on a tile it usually opens the relevant app like chrome or maps. There the back button works as expected.
For e.g. say I'm checking email in gmail. I launch google now by swiping up from the home button while I'm in gmail. After checking the tiles I'd expect that the back button will take me back to gmail. Currently I have to open the multitasking pane to get back to gmail from google now.
Do google voice commands work in nova launcher?