If you're afflicted with this bug yourself, you can get some relief by uninstalling KB50000802 until Microsoft comes out with a fixed update, presumably by April's Patch Tuesday.

On a Windows 10 or Windows Server PC version 2004/20H2, click Start --> type "Control Panel" and hit enter --> go to Programs, then Programs and Features. From there, click "View installed updates" on the left-hand pane and uninstall Security Update for Microsoft Windows KB50000802).

For Windows PCs version 1909, the same fix (and problem) is in KB50000808. If you're on version 1809, look for KB50000822. For more technical detail, Dutch tech site winking.be has an excellent overview.