After applying the CinemachineBrain component, the sky box stops rendering

[F1Soda]

When I add a new camera to the scene, the skybox is rendered, but when I add the CinemachineBrain component, it disappears immediately. On the scene the skybox is visible, in the Lightings/Envitonment/Skybox Material section the standard skybox is set. I solved the problem in a very strange way: I deleted all the cameras, then created a new one, started play mode and in the moment of the game assigned the component – after that everything worked.
But now I will not be able to show any screenshot with proof( When trying to repeat the bug, everything works correctly.

I have not found that someone also faced a similar bug, so I decided to write. Perhaps someone has an idea what this is related to?

[F1Soda]

I found out that the problem was not with Cinemachine, but with the Clipping Planes/Near setting – At values less than -50, the skybox gradually turns black. What is the reason for this behavior?

Clipping Planes/Near > -50

Clipping Planes/Near < -50