Under what circumstances will the coil box of the Xiaomi 80W Adaptive Wireless Charging Stand pop up?

In addition to charging the phone normally, the coil box of the wireless charger will pop out if the light sensor of the wireless charger is accidentally touched or blocked, the wireless charging surface comes into contact with metal foreign objects and the phone is placed abnormally, etc. However, this is a normal phenomenon. And you need to remove it to restore the above error state.