Tapo doorbell seems to go into standby mode from evening to morning. I use the doorbell wireless (battery).

There is no exact time that the doorbell seems to stop detecting motion. Sometimes from late in the evening and sometimes from early evening. So light or dark make no difference.

I'm sure that there is movement at that time, but I do not see it in the list of recordings. Sometimes I have the idea that it stops as soon as I'm not or less online with my smart phone or other devices. While the wifi is on day and night. In the morning I sometimes see that recordings have only started from the moment I started using my smartphone.

The same with evenings when I stopped with looking at my screen. 

In general there are every night at least 5 or 6 hours recording without detection recordings. For sure there is movement of walking people and cars in this period.

Is this a setting or is something else going wrong? 

Thanks!