Black clipping

I'm having a "huge" trouble with my new Mac Studio (base configuration) with Monterey (latest version)! I just finished to install the new version of Lightroom (v. 11.3.1) and i can't use "the black values" in "tones" beacuse produce an easy black clipped on the dark part of the image.

Like this ican't work! I'm a proessional photographer!

It's happened once with my mac mini m1... ater some "lightroom" update disappear! 

What can i do? 

I have tried to open the same RAW File (produced with my Canon EOS R) with photoshop, using Camera RAW, and nothing happen... everything works great!

HELP

I'm using a Benq PD2700 4K monitor!

Sorry for my english, is not my language!