I think it is because the graphics of their games are high and maybe it gives stress to your CPU or in some point maybe your computer specs are not that high that can support high-end games or processing power. I advise try to explore your computer maybe it needs a proper cooling system or airflow to aid your problem when it comes to the high temperature of your CPU and also maybe you're doing other activities in your pc aside from playing gambling then that will be the main reason I think.