Hello @Vich 

Do you mean tapo Camera 1) or motion detection is not triggered Or 2)  stop recording motion detection clips into SD card Or ) Cloud videos does not record at certain time or 3)?

Did you recently subscribe Tapo care(free trial ) and issue start since that? Did you recently update firmware for Tapo camera? 

If Motion Detection stops into SD card/ Motion does not trigger the 

1. Check if camera Alarm goes off when motion detected
1. Please check Case 1to check Motion Detection settings first, make sure Activity Zone
https://community.tp-link.com/en/smart-home/forum/topic/271186

2. Double check Recording Schedule, Motion Detections/ Continuous recording should be selected(all time blocks are selected and green)

How to use motion detection function of my Tapo camera in Tapo app

3. Check if Tapo APP-Message box ( envelop icon) has any motion detection message?

4. Did you enablePerson Detection/ AI detection on camera?

Can you help confirm some information to help locate the issue

1>Mac address of camera ( please check private message)

2> When does the issue started, the time period camera does not record, please share a photo 

3>  If event is missing or not motion does not trigger , please you manually record a video clip and share a link with us, thank you