iPhone & iPad reboot itself overnight how do I make it stop

[pcslookout]

Every morning I see I need to enter my pin to enable touch id because my iPhone and iPad rebooted during the night.

How do I make it stop ?

 

[Paperlantern]

Do you have an update that is failing every night or something maybe?

 

[pcslookout]

Do you have an update that is failing every night or something maybe?

Nope I don't think.