Why does the Xiaomi 15 Ultra have obvious lags when using Director mode?

Thank you for your attention. This phenomenon is caused by network interference in the surrounding environment. In Director mode, the main and secondary monitors are connected via Wi-Fi. When there is significant network interference, the preview on the secondary monitor will become choppy or unsmooth. This issue is temporary and will be resolved once you return to an environment with less network interference.
The performance of the monitors can return to normal in a stable, interference-free setting, allowing for a smooth and seamless experience. Please rest assured that this is a common occurrence due to environmental factors and will not affect the overall functionality of the system.