Vision Client Tags folder in Ignition 8 sometimes not visible

When I open the Project Library folder in the Project Browser, I see that the Vision Client Tags folder has disappeared in the Tag Browser window.
After opening for example the Vision folder or a project window, the Tag Browser window is closed and another Tag Browser window opens where the Vision Client Tags are present.
Is there a special reason for this?

Because Vision Client tags are only available in vision client scopes. Showing them everywhere led many people to think they were available everywhere (ahem, Perspective). Scripting is a special case, as scripts can be called from many places, some having client tags, some not. The change in v8 to only display in Vision itself is deliberate.