I'm using naza V2 on the latest version for software and my flight controller is fully upgraded. When I go into my rc settings it doesn't show advanced receiver protection, my quad has lost connection before, but failsafe doesn't kick in, any help?

I'm using naza V2 on the latest version for software and my flight controller is fully upgraded. When I go into my rc settings it doesn't show advanced receiver protection, my quad has lost connection before, but failsafe doesn't kick in, any help?