When the bug task does not mention a specific ubuntu release, it means "whatever is devel at the time". Now that means bionic, where it's fixed and available, that's why the task was marked as fix released.
To have it fixed in Xenial and other stable releases, the procedure outlined in https://wiki.ubuntu.com/StableReleaseUpdates has to be followed.
When the bug task does not mention a specific ubuntu release, it means "whatever is devel at the time". Now that means bionic, where it's fixed and available, that's why the task was marked as fix released.
To have it fixed in Xenial and other stable releases, the procedure outlined in https:/ /wiki.ubuntu. com/StableRelea seUpdates has to be followed.