Yep, that's still an issue, but we're getting there.I see everyone saying launcher is fixed but when ever you clear recent apps it backs to default launcher and then I need to lock and unlock to get nova back.
After using the Recents, it will return you to the Nubia launcher, but if you've set up the home button to default to Nova (or other third party launcher) it'll return you to your chosen launcher - no need to lock/unlock, just hit the home button.