FIX: Stop tracking incoming message after navigating away take 2. (PR #14508)

Previous fix in d82e5cd37c1c3b2377507ed0354bbdce6a96ae99 resulted in counts being flappy as we cleared the active inbox between routes.

Follow-up to d82e5cd37c1c3b2377507ed0354bbdce6a96ae99

GitHub

        "does not display the topic incoming info"

Thank you so much for the review @OsamaSayegh