You didn't write more details and description of recent situation on your device, what way of unlocking you used, do you run some unlock, or just replaced original .exe with igo8/primo .exe?

At all the best way is to add some simple unlock, there is plenty of simple unlocks, like some of my friend xtyler92 for your device, based on sysinformation.exe of Daniel Schumann, so there you can add simple unlock, with software power off button-standby, instead using hardware buttons, and then will not be restarts of nng's apps.

Just use google.com, and some of mio c320 unlocks.

And i don't understand why you don't turn off nng's apps (iGO8, Primo, et.c) before put device in sleep or turn off.