Live's bell is realtime too: the shell initialises OpenVibeNotifications itself (before the shared navbar, which then leaves it alone), so the navbar's notificationsRealtime (13525eb) never reached it. The shell's init now passes realtime: true. Found with a signed-in browser check: Blog's bell opened a stream, Live's stayed on polling.

ddiff --git a/public/index.html b/public/index.html
iindex d23e8bbe..69f7ed99 100644
---- a/public/index.html
++++ b/public/index.html
@@@ -1050,6 +1050,7 @@ document.addEventListener('DOMContentLoaded', function initOpenVibeNetwork() {
              apiBase: openvibeToolsBase,
              soundBase: '/assets/sounds',
              swPath: '/openvibe-sw.js',
++            realtime: true,   // new notifications over OpenVibe.Events, polling as the fallback (Shared 1.22.0)
          });
          OpenVibeNotifications.__ovNavInit = true;   // the shared navbar mounts (and re-mounts) the bell itself
          if (!mount.childElementCount) mount.appendChild(OpenVibeNotifications.createBell());