Try switching the computer off at the back. Hold the start button in for 20 seconds ,turn the computer back on and see if that helps.
I am getting a lot of that at the moment but I am using a TV as a monitor.
So worth a try.
Trump issues executive orders to restrict TikTok and WeChat in the US
Yuke Li's 'pencil' drawings are entirely digital
Apple releases the public beta for macOS Big Sur
Les meilleurs bracelets connectés (2020)