Night vision goes on and off

I purchased the stick up indoor outdoor wireless security camera and it arrived yesterday. I installed it in my backyard and checked in out it last night to find that the night vision was turning on for 3 seconds and then off for 3 seconds. This continued indefinitely and is foing it again tonight. The battery is fully charged and i toggled different settings like color night vision on and off. Ehat else can i do? Is it defective?