Windows Hello opens in the background (After 8.12.1)

Nothing yet. I worked around it using AutoHotkey v2. You can compile this to an exe file and throw it in the Windows Startup folder so it starts when you login. It will force the Windows Hello box to the foreground when it launches.

#Requires AutoHotkey v2.0
#SingleInstance Force
Persistent

A_IconTip := "Windows Hello Foregrounder"
TraySetIcon("shell32.dll", 48)

myTray := A_TrayMenu
myTray.Delete()
myTray.Add("Exit", ExitScript)

DllCall("RegisterShellHookWindow", "Ptr", A_ScriptHwnd)
OnMessage(DllCall("RegisterWindowMessage", "Str", "SHELLHOOK"), ShellHook)

ShellHook(wParam, lParam, *) {
    if wParam = 1 {
        try {
            if WinExist("ahk_class Credential Dialog Xaml Host ahk_exe CredentialUIBroker.exe ahk_id " lParam)
                WinActivate(lParam)
        }
    }
}

ExitScript(*) {
    ExitApp()
}