Grammarly is injecting some sort of weird metadata into posts on some forums. In particular, the last one was on TechNet. Here is the link to the post in question. https://social.technet.microsoft.com/Forums/windows/en-US/cdfe7d70-2ff7-4025-87db-e26d452d27a2/how-can-i-completely-disableremove-readyboost-in-windows-81?forum=w8itprogeneral
It is very annoying, I am going to have to disable Grammarly for the time being which pisses me off because it's awesome.