Objects appear to be moving when my camera does

Hi,

I'm new to Unity, but I will do my best to explain the issue I'm having. I've tried searching the forums, but I'm not quite sure to what keywords to use (english is not my native tounge).

I'm using the "FPSController" from the "Standard Assets". If I place a sphere with a cube behind it and position my camera in front of the sphere, I can only see the sphere - as intended.

However, if I move my mouse to the right, the cube starts appearing to the left of the sphere. It's kinda like I'm moving my view to the right, but the world is also slightly rotating to the left. If I move my mouse to the left, the cube gets visible to the right of the sphere.

I've tried changing the settings on the camera component, but I'm not quite sure what to be looking for - and what to be looking at.

Any ideas? Do you need anything else from me?

Best regards,

Anton