Door bell chime goes off during the night

Our doorbell system is hard wired. At least once or twice a week, during the middle of the night, the doorbell rings and we are alerted by the ap. We review the video and there is no activity of any kind. I understand that the doorbell actually needs to be pushed. We have since deactivated the voice command, but it too was replying, we can't come to the door right now. There are bugs flying around, but they don't or cannot push the buttonAgain, always during the night and never during the daytime house.Any suggestions help on this topic.