I am using the endpoint below to create a relationship between two records 

/<module>/:record/link/:link_name/add_record_list/:remote_id POST

example URL in request:  xxxxx.sugarcrm.com//rest/v10/Meetings/xxxx/link/contacts/xxxxxx

I was able to successfully create the relationship through the REST API.  I am also able to run a GET request to retrieve this relationship.   However, I am not able to see this relationship in the UI.   Is there a step that I am missing?  Thank you!