ZoomMtg.join() silently fails after Marketplace review session – WebSocket connects but participant never joins

Update: I found this related thread: Join failing when using new App Client ID/Secret instead of legacy SDK keys. In that case, Zoom confirmed and fixed a bug on March 19 where new Client ID/Secret credentials failed for external meetings. My app uses Client ID/Secret as SDK Key/Secret (General App, no legacy SDK keys), and the issue started on March 23 after a Marketplace reviewer accessed the app. Could this be related to an incomplete fix rollout, or a similar server-side issue affecting my specific app/account?