Colors of the generative fill are screwed up since last update

Everything was working well until I updated my version of Photoshop Beta.

Since that day, the colors of the generative fill are completely screwed up.
In the thumbnail previews, the colors are correctly blended with the background, but not in my image.

I tried to fix the problem by uninstalling and re-installing the latest version of Ps Beta (25.0.0), and rebooted. No change.

I updated my OS (now macOS Ventura 13.5.1) and rebooted. No change.

Hopefully someone will be able to help...