If the Xiaomi Soundbar Pro 2.1 ch experiences lag, stuttering, or audio delay when playing music via Bluetooth, please refer to the following steps:
Move the playback device closer to the Soundbar and remove any obstacles that can interfere with the Bluetooth signal.
Avoid using the Soundbar near Wi-Fi routers, microwaves, or other devices, as these can cause Bluetooth interference.
If the issue persists, switch to another input mode, such as HDMI or Optical, to check whether the problem is related to the Bluetooth connection.