This release is a bugfix release.
Reminder: Compatibility with Jira Cloud
Atlassian has announced to remove usernames and user keys for Jira Cloud by the end of April 2019. This is affecting how user data is accessed in the cloud and also how you are synchronizing user data. The last releases have already provided lots of updates. Hence, if you are synchronizing Jira Cloud ↔ Jira Cloud or Jira Server ↔ Jira Cloud, we suggest to read the previous release notes of Backbone 3.9.0 which contain steps you should follow.
All updates and fixes in this release
New Features and Improvements