If you set a custom page root, the breadcrumbs on home page will display "Home" but nothing is displayed on other pages and it looks weird. It should be hidden on home page as well. "Root breadcrumb" is set to "None".
Thank you for reporting this issue, it has now been resolved. We are aiming to include any changes that have been made in a future XF release (2.1.10).
Change log:
Check breadcrumb hrefs against the full request URI (including scheme and host) as well as the partial request URIs to determine when they should be automatically hidden.