Reproduce issue then report to Samsung Members app > Get Help > Error Report
What is the device model number and software version (settings > about phone > software information > build number (last 4 digits)) ?
I have the same issue, with Exynos CPU, sometimes the phone lags a lot, it looks like the refresh rate drops to 15 or something like that. I have the latest updates on everything, it happens everywhere, even in the lockscreen or homescreen. It's not heat and it lags even with enchanted processing on.