Use ? or C-h m in the affected view to check its current keys and M-x notmuch-version to identify the package. Consult Notmuch’s own manual for its behaviour before treating a database or display problem as a speech problem.
For bindings, loaded source versus byte-code, presentation rules, sounds, or backend issues, open Aural Doctor through C-e H D d or M-x emacsvox-aural-doctor. Recent feedback at C-e H f h or M-x emacsvox-aural-list-recent-feedback shows the bounded presentation submitted for an action. These diagnostics do not query or modify mail.
For source-level work, Integration Maintenance contains the build, test, renderer, and asynchronous lifecycle contracts.