I noticed that recently (2018-01-22?) Jira stopped sending the referrer header when calling cloud add-ons. For example, when my add-on page is at https://acme.atlassian.net/plugins/servlet/ac/my-page?foo=bar, the URL used to be included in the “referer” HTTP header when calling the connect add-on.
Is this an intentional change or a new bug? How can the server get the host URL, with query params etc?