screensaver disturbances

this week my iMac 2017 upgraded to Sequoia via OCLP. No problem except my screensaver gives disruptions see image. Wasn't with Ventura. Does anyone have anything similar or solution to this.

https://preview.redd.it/9k3t4qh0id3g1.jpg?width=4032&format=pjpg&auto=webp&s=cbedfd999f94127ec3bc40feb541a034d20c457d