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Hi ​@Carlos Citadini, welcome to Zoom Community!  Here are some steps and best practices to help reduce or eliminate the delay you’re experiencing when clicking Join and seeing a black screen before entering the breakout room.

• Check Your Zoom Client and Network

  • Update to the latest Zoom version — performance improvements for breakout rooms are regularly included in updates.

  • Use a stable, high‑speed connection (wired if possible). Latency often occurs when the client reconnects to the breakout room server.

  • Close background applications that consume bandwidth or CPU (e.g., cloud sync tools, streaming apps).

  • Test your network using Zoom’s built‑in statistics (Settings → Statistics) to ensure low latency and minimal packet loss.

• Optimize Breakout Room Performance

  • Join from the Zoom desktop client rather than a browser. The browser experience can introduce additional delay when switching rooms.

  • Avoid switching rooms too quickly; allow a few seconds between leaving one room and joining another to let the client re‑establish the session.

  • Disable HD video temporarily if your network is congested. This reduces the data load when entering a new room.

  • Ensure the host’s device and network are stable, since the host manages breakout room assignments and transitions.

• Co‑Host Considerations

  • Co‑hosts rely on the host’s breakout room configuration. If the host’s connection is slow or the meeting has many participants, transitions can take longer.

  • Ask the host to pre‑assign breakout rooms before the meeting starts to minimize processing time when rooms open.

  • If you’re frequently switching between rooms, consider using the “Move to” option instead of waiting for the prompt. It can reduce the black‑screen delay.

• Additional Tips

  • Keep your Zoom app cache clear (sign out and back in occasionally).

  • Use the latest operating system updates and ensure your GPU drivers are current. Outdated graphics drivers can cause black‑screen rendering delays.

  • If the issue persists across multiple meetings, try reinstalling the Zoom client to refresh local configuration files.

• Known Limitations

  • A brief transition delay (1–3 seconds) is normal as Zoom re‑establishes the video stream when moving between breakout rooms.

  • Longer delays may indicate network congestion or device performance issues rather than a Zoom service problem.

Keep your Zoom client updated, use a wired or high‑speed connection, and minimize background load. Pre‑assigning rooms and joining via the desktop client usually provides the smoothest breakout room transitions. Hope this helps!

Hello ​@Carlos Citadini! Have you seen the response to your concern? If it answers what you were looking for, please consider marking it as the best answer so others can benefit from it as well.

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