Github user mcgilman commented on the issue:
https://github.com/apache/nifi/pull/2899
@patricker Just had another look. I think there is one case that still
hasn't been addressed. When a user has been granted permissions to the root
group, the document title does update to the root group name. A check has been
introduced that will only change the document title if the user has access to
the root group.
However, if the user does have access to the root group and those
permissions are removed the document title does not change back to the previous
value. It retains the name of the root group when they last loaded the page. We
should be restoring the default value. The default value is loaded through the
about endpoint [1]. It would probably make sense to store that value when the
page loads so we can restore it in an else clause in your PR.
Let me know if you any assistance here. I'm happy to help.
[1]
https://github.com/apache/nifi/blob/master/nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-ui/src/main/webapp/js/nf/canvas/controllers/nf-ng-canvas-global-menu-controller.js#L318
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