What exactly is Windows 10 20H2?
It's the new build of Windows 10. In Windows 10, click on "start -> settings -> system -> about" and look at the version.
Also in Windows settings, goto update and security and check for updates so that you can download and install KB4598291. Or, look in your update history to see if it has already been downloaded. Sounds like it hasn't though if you have this bug.