During first logon Windows Hello for Business requires MFA during initial enrolment. The application workspace launcer starts at the same time. This can trigger multiple MFA prompts which are not visible for the user. This will cause errors in the Microsoft Authenticator, preventing Windows Hello from completing.
We hope there can be a feature that let the Application Workspace Launcher wait for Windows Hello for Buisnis to finish during first logon of a user, before the launcher sends a 2FA request.