It's something to do with one of the Windows 10 Updates over the last 2-3 Months.
Couldn't tell you what exactly is causing it., only that disabling Game Mode can help.
It is also something that is only affecting Ryzen Processors.
I have some red flag raised over this... given how this is occurring right when Intel is having a Very "Bad" Quarter., especially compared to AMD.
Maybe it's due to some "Honest" Mistake in some changes within the Windows Codebase., but, eh... it's oddly coincidental.