Disable Android Auto?

Have a car dock which triggers car mode as before, only with Lollipop it triggers Android Auto, which hijacks the home screen - if I'm running Google maps and want to go to home to open another app (music player, Sirius, etc.) when I hit the home button I get quick flash of a green Android Auto screen, then it snaps back to maps - can't get to home - if Maps is running and you hit the back button, it closes or stops navigation, which means i would have restart maps again just so can launch another app - this was not an issue on Kit Kat - only choice so far is to exit Car Mode via the drop down screen, but then unless I'm running nav the phone goes to sleep -

As I understand it, Android Auto is meant to allow phone to interface with enabled car radios, and is not needed/usable on radios which are not Android Auto enabled, like mine - any ideas/solutions/work arounds would be much appreciated -

FYI, I'm running Lollipop 5.1 bone stock from OTA update - I have done a factory reset since the upgrade -

Thanks to all -