Not able to get callback on different port than 443

@IntegrationSupport @Ramandeep24

We are trying to use https://<domain>:444 as our sandbox callback URL. But we are not getting any callback. When we use webhook or https://<domain> we are getting the callback. Both the URLs have proper valid SSL certificates.

Is it expected that callback url should be only 443 https URL? Please let us know

Our Sandbox ID: SBX_002101