A baddy gets the camera, holds the button for some time and that resets the camera (disassociates the camera from the base station). The recordings for that camera on the base station are now gone because they are encrypted and rely on the association the camera had.

Eufy refused to fix the problem. It was something that could have been fixed with a firmware update via its app.

It was a shame, the cameras were good but the product overall wasn't fit for purpose (due to their incompetence).