This is intended and has legitimate use cases.

In T8510#200946, @aklapper wrote:

In https://phabricator.wikimedia.org/T76732#2803813 ksmith brings up that "In the search bar in the toolbar at the top of the screen, searching for "Maps" brings up Maps as the third option. Searching for "Discovery" brings up Discovery as the second option."

After D19384, we'll automatically mark these "phantom" notifications as read when you open the menu to review them:

This will ultimately be covered by T13105.

See followup in T13105.

Also relevant:

(For completeness, this came up via the support queue in PHI411.)

This task is a giant mess with pretty much no remaining actionable use cases. See T13074 for plans. If you want some use case here included in that, file a description of your problem via support pact.

I second this:

Not all applications have full policy support yet, usually because it's blocked by something or they're beta.

In T5698#223992, @chad wrote:

Oh hai Cura uses Phabricator? I have a Lulzbot at home!

Oh hai Cura uses Phabricator? I have a Lulzbot at home!