The Xiaomi Smart Band 8's strap supports quick release, and the quick release button is movable. There is slight movement between the quick release button and the strap head after assembly, which is not a malfunction. This design ensures the normal operation of the quick release button and maintains the tactile feedback. To prevent the button from loosening after assembly, the strap is designed with a slightly tight fit. If the button does not fully click into place after assembly, press firmly and quickly during assembly to ensure the strap is securely in place, allowing the button to click into place correctly.