When this happens to me, I usually puzzle over it for too long then realise my laptop has become unplugged and it’s trying to save battery power. But not everyone is as much of a muppet as me grin.

Have there been any operating system or driver updates? Have you swapped from Vulkan to DX11 or vice versa?

"You may call it 'nonsense' if you like, but I've heard nonsense, compared with which that would be as sensible as a dictionary!"