(This applies when MongoDB is selected as the KB type.)

The Build Failure Analyzer settings on the Manage Jenkins > Configure System page are always loaded with "Enable statistics logging" selected and "Enable statistics logging of successful builds" unselected, regardless of the values that were previously set and persisted to build-failure-analyzer.xml. Anytime the configuration page is saved, then, these two options are reset, even if the user did not touch them.

The result is that any time changes are made to the configuration, care must be taken to ensure that the statistics checkboxes are set as desired – since so many settings are included in this single page, this is not particularly safe and can result in important information being lost.