@Whag 

Hi,
Since the Tapo C200 is a cloud camera and updates the firmware via the cloud server, it's hard to roll back the firmware directly. In this case, I'll try my best to help you solve the problem on the firmware 1.3.5 version.

For your problem, please refer to the link below to check if the settings on the camera are correct.
Motion Detection Is Not Working On TP-Link Camera.

If the settings are no problem, please try to reset the cam and reconfigure it, then check if it will work fine.
How to reset my Tapo camera?

Best Regards

  @allan47 

Hi,

Generally, you can go to each cam's Camera Settings page on the Tapo app, then click on camera info>Firmware>Auto Update to turn it off if it's on, and then the camera won't update the firmware automatically.

If you have the same problem, please try the suggestions in my previous reply, and if the problem remains, please help confirm the following information for further analysis.

1. Model number, hardware version, and firmware version of your camera.
2. The camera settings pictures relate to the motion detection issue, such as the Detection&Alerts page and motion sensitivity settings page on the Tapo app.
3. The detailed problem phenomenon.
4. The model number of your router, and please describe your network diagram: e.g. ISP Spectrum-Archer C7 router<Wireless> Tapo cam.

Best Regards