@Kieran_Levin Mine has done it pretty much constantly since I got the laptop, whether on AC or battery.
But on a hunch, I reseated all the expansion cards and the static seems to have gone away. FWIW, I’ve been running the following arrangement of cards:
- Left Rear: Type-C
- Left Front: HDMI
- Right Rear: Type-C
- Right Front: USB-A