I updated to version 2.2.13 today and found that builds are failing to report to BitBucket. Neither in-progress or a complete result is posted. Reverting back to 2.2.12 fixes the issue for me.
When it fails I see this in the console output
[Bitbucket] Notifying pull request build result
Can not determine Jenkins root URL or Jenkins URL is not a valid URL regarding Bitbucket API. Commit status notifications are disabled until a root URL is configured in Jenkins global configuration.
I don't see this now that I reverted