Shadow slider doesn't change image

[sd photos]

When trying to use the shadow slider I don't see any change, if I use the auto selection the shows do change.

how do I fix this. Another friend is having the same problem since the last update. We are using Mac 12.0.1

[AxelMatt]

Please try to reset the Lightroom preferences.

https://www.lightroomqueen.com/how-do-i-reset-lightrooms-preferences/

If this doesn't help we need more informations about your environment.

Which operating system do you use?

Which version of Lightroom do you use?

Please post the exact version and not only phrases as "recent", "latest" and so on.