As soon as the electrical circuit switch in the bathroom is turned on, the leakage protector jumps,

If the valve core of the faucet is grinding, it must be replaced, and then the internal sealing ring of the faucet is aging, the sealed raw tape is also aging, and the screws are not tightened.

It may be that the sensitivity of the leakage protection is different between the two.

Make a sandbag with cloth and press the floor drain on top. Or pour some water on the floor drain.

If you can't move it, install a curtain on the mirror, open it when you use it, and close it when you are done.

You first check whether the switch wire is active, if not, it is the LED starter or light strip failure, it is best to find a professional acquaintance, pay attention to safety!