Camera not consistently detecting a person

I have the battery cam pro in my kitchen which sees straight to my front door. Do anyone have a problem with it not picking up a person in a room consistently? It will recognize a person there for a few seconds then there is no more events for 10 to 20 minutes before it recognizes the person is still in the same position and create a new event. It seems weird to me or could it be someone is pausing my internet network?