According to https://bugzilla.redhat.com/docs/en/html/query.html#individual-buglists, You can add and remove tags from individual bugs, which let you find and manage them more easily. Creating a new tag automatically generates a saved search - whose name is the name of the tag - which lists bugs with this tag. This saved search will be displayed in the footer of pages by default, as all other saved searches. How reproducible: Always Steps to Reproduce: 1. pick any bug and add a tag to it. Actual results: No new saved search is added in the footer of pages. Expected results: A new saved search whose name is the name of the tag is displayed in the footer of pages.
This feature was disabled upstream in 4.2. Upstream have a patch to update the documentation which we will inherit (if approved upstream) as part of our next release. -- simon