The laptop is connected to the eGPU (cf Razer Core X Chroma eGPU). But AFAIK it’s 100% charged and has been during the entire session.
The Windows task manager “Performance” tab indicated 0.18Ghz.
It happened 3 times last night when I was playing Aliens Fireteam and Cyberpunk 2077. The first 2 times it got back to normal after 1-2 minutes. The 3rd time I had to reboot.