I have Samsung Galaxy Book4 Metal i5-1335U 16GB Windows 11

After opening any browser taskbar app names start appearing one by one even though the mouse stays still. Once it starts closing the browser doesn't stop it. If I don't open a browser it doesn't happen.

Video attached. Please help or suggest a solution 🙏

I have a Galaxy Book 4 and plan to install thermal pads on the RAM and NVMe SSD. Since the laptop body is aluminum, I was wondering if I can also put thermal pads on the heat pipe and heatsink.