Images opened in Photoshop Beta all appear overexposed

For the last couple of weeks all images opened in Photoshop Beta appear overexposed. I usually open Raw files after doing initial edits in Lightroom but the same happens if I open files directly from the computer or cloud storage. File type makes no difference, the same occurs with TIFF, PSD, JPEG etc  Images open correctly when I use Photoshop 2026. These screenshots of the same imgage show the difference:-

As Photoshop 2026 (and all other photo viewing software) shows the image as expected, the problem is clearly with Photoshop Beta.

Hopefully this can be sorted!