@alvaro123 

Thank you for the feedback, if a motion is not detected or motion is not recorded, you could adjust some settings as below. 

1. Confirm Motion Detection is 'ON', and  set up proper Activity zone & Sensitivity settings as instruction here
How to use motion detection function of my Tapo camera in Tapo app

2. Turn on Alarm and check if see if Alarm goes off when a motion happened in the Activity zone? 

If the issue persists, can you help provide some information to help look into that further: 

1) the video clip showing the issue (use Tapo APP to manually the video and share video link here )

A photo of Playback timeline at that time. 

2) photo of motion detection settings, Activity Zone & Sensitivity 

3)  Does an Alarm go off when there is a motion? 

If you use Motion detection/Continuous recording, please share photo of Recording Schedule,

4) Mac address of camera( please share MAC by  private message) / Tapo APP version 

For ' does not detect movement in a corner.' may I know how did you find out this? 

Hello   @alvaro123 

Thank you for more details, if there is no contrast when there is sunlight,  it could be related to the environment where camera positioned.

Avoid glass or transparent objects in  front of camera 

You could try adjusting the angle or position of camera where it could get proper contrast and, try to  avoid sunlight reflection.

If the concern persists, can you share manually recorded videos clips shared link by private message and we will see if it's normal.