Mixer brush is not useable with latest updates

Mixer brushes in latest version (PS desktop 25.11 and 25.12) appear corrupted and do not work properly. The color box in the toolbar shows random colors and jagged gray lines rather than the selected colors or color mixes. Brushes do not work as expected or as they did prior to update. Color choices are impossible to sort out. This behavior began in the prior version of Beta but had not infected the "regular" PS until this most recent update. My system is Apple Studio M1 max 32 g ram Ventura 12.6.1. Four other users I know with different systems, machines and OS are experiencing the same behavior so it is not a bug confined to a unique situation.