F5 XC and Azure FrontDoor

Injeyan_Kostas​ do you have some example of configuration where it works? Because I have new domain with valid certificate, for example "connect-from-fd.mydomain". I can connect from FD to the "connect-from-fd.mydomain" but such domain on LB has no routes. Purpose is only to establish connection. When application is requested it's just reports:
Your support ID is suportID
Error 421 - Misdirected Request

What is also strange I cannot find any log on LB related to this event so cannot check how requests looks like.

I also tried to create route to forward traffic when host header is "connect-from-fd.mydomain" and overwrite host header to static value and route it to the correct origin but it result to same error with response code 421. And again no logs available.