https://www.bleepingcomputer.com/news/microsoft/microsoft-fixes-windows-10-auth-issue-impacting-remote-desktop/

Microsoft has fixed a known Windows 10 issue causing smartcard authentication to fail when trying to connect using Remote Desktop after installing the cumulative updates released during last month's Patch Tuesday.

As explained by the company, devices attempting to make Remote Desktop connections to devices in untrusted domains might be unable to connect.