Random Mouse Lag Triggered by Video/Animation

I'm facing an intermittent issue that seems to occur during video or animation playback in browsers. Since I rarely use any software other than web browsers, I can't confirm if the problem extends beyond them. The issue causes mouse lag, which persists despite troubleshooting with various mice, including both Bluetooth and USB-connected types, to rule out the mouse or its drivers as the source of the problem. Intermittently, the screen briefly goes black during video or animation playback, accompanied by a subtle shift in color temperature upon returning. At the same time, mouse movement becom

Question by user12480 on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.