Problem:
After restarting Jenkins, the config.xml files under $JENKINS_HOME/jobs are missing.
Some jobs still appear in the Jenkins UI, but their configurations cannot be loaded or are incomplete.

Steps to Reproduce:
1. Navigate to $JENKINS_HOME/jobs directory
2. Check job folders
3. Observe that config.xml files are missing
4. Restart Jenkins (if applicable)

Expected Result:
Each job directory should contain a config.xml file and Jenkins should load job configurations correctly.

Actual Result:
config.xml files are missing from job directories.
Jenkins cannot properly load or restore job configurations.

Additional Information:

• Jenkins: 2.4440.2
• Plugin: all-changes-plugin
• OS: Linux

Command output:
$ ls -ltr $JENKINS_HOME/jobs
(total output showing missing config.xml)

No manual deletion was performed.
Issue may have occurred after restart/upgrade (if applicable).