Ring doorbell pro ignore people and does not trigger motion alert occasionally

Hi, I have ring doorbell pro, most of the times it works well, can detect motion and send notification quickly, but I notice multiple times that it won’t trigger any motion alert action even if there is people in/out of my front door. If I intentionally reproduce the action missed several minutes ago, it may capture and trigger alert. I have configured everything and the ring doorbell has good internet connection as well as power, is this due to occasional health check? Does ring doorbell shortly freeze during health check? It’s not just one time, I noticed more than 3 times but very occasional.