android 6. and nvida shield
I have an Nivida shield updated to android 6.0. despite the settings the time limited apps run when they are not supposed to. Package installer, when it sets permissions- the tablet has to be manually unlocked to set permissions.
We do not have this specific model but we have many customers with Android 6.0, for example the popular Nexus devices from Google. To test application control, you can add an app, for example, the Settings app to the protected app list and make sure that Funamo protection is turned on. The app should be blocked all the time.