Why is there an inconsistent noise cancellation effect between the left and right earbuds of the REDMI Buds 6 in subways and buses?

The reasons are as follows:
1. This is primarily due to the earbuds becoming loose during bumpy rides (subways and buses), which is a common issue in half-in-ear earbuds. If this happens, please remove and reinsert the earbuds, adjusting their position to ensure both earbuds fit snugly;
2. Additionally, it is related to the firmware version. Please update the earbuds to the latest version to have a better experience.
The firmware update methods are as follows:
1. Update via the Xiaomi Earbuds APP. Update method: Ensure the earbuds are connected to your phone and open the Xiaomi Earbuds APP. If a new version is available, a firmware update prompt will appear. Tap the prompt to enter the update interface and tap the update option to update now. After that, wait patiently for the upgrade progress to reach 100%, and the earbuds’ firmware will automatically update;
2. Update via Bluetooth settings. Update method: Ensure the earbuds are connected to your phone, open system settings, go to Bluetooth, tap the arrow icon beside the REDMI Buds 6, and check for firmware updates. After that, wait patiently for the upgrade progress to reach 100%, and the earbuds’ firmware will automatically update.