After configuring the Identity Broker console and performing normal use, configured connectors will sometimes go missing. This happens to individual connectors, and sometimes more than one at the same time.
This was thought to have been caused by
IDB-454 as the logs appeared around the same time, but will need to be confirmed. See https://unifysolutions.jira.com/browse/IDB-454?focusedCommentId=29123&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-29123
Customer support service by UserEcho