Voice control using most of my GPU, only way to fix restarting computer

Can you help? I constantly use voice control. The challenge is after a couple of hours of using it my computer slows down and checking the activity monitor seems to be using a large amount of GPU. The only way I can get my computer to work again efficiently is to restart the computer.

Has anybody else experienced this? If yes what have you tried to fix it? It would be great if I there is a way to restart the dictation. Based on some other suggestions I've tried using terminal but that hasn't helped.

I'm dyslexic and this is a real lifesaver for me so hard to do it without it. Look forward to hearing in any suggestions. I've also taken into the Apple Store and contacted support but all they've asked me to do is keep logs. I've submitted them but I haven't heard anything conclusive back