P: PS 27.10 - Brightness control in Sky Replacement inoperative

The Sky Replacement tool on my Windows 11 (25H2) PC was working perfectly up until I update Photoshop to version 27.10 .0 three days ago.

Selecting Sky Replacement in the Editor (Edit » Sky Replacement) is OK and all my skies appear.

When I select a sky, I find all of the sliders and functions, except Brightness function perfectly.

The Brightness slider can be moved to both extremes, but no change in Brightness materializes. 

I have performed a clean instal of Photoshop, without effect (Uninstalled PS with Revo Pro Uninstaller, and thereafter deleted every Adobe folder I could find).

Even performed a clean reinstall of the Windows operating system.

Finally, I restored my system, from a Macrium Reflect X to a state prior to the Photoshop to version 27.10 .0 update. Low and behold - the Brightness for Sky Replacement works.

It looks like a Bug, to me.

Appreciate any comments/advice

Brian