Issue
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Navigating back, then forward, might causes loss of config data
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Open Jenkins Global Configuration
/configure
, with the Chrome browser (Firefox does not show this problem). -
Click the back button to navigate away from the config.
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Click forward to go back to the config.
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Some configuration like the Tool installers might be lost.
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Resolution
Unfortunately, for the moment there is not a good workaround for this. Basically, JENKINS-18435 needs to be fixed.
You might want to use Job Config History plugin and do periodical backups of your Jenkins instance to get a quick recover in case you are facing this issue.