Is it normal that the receiver lights up even without pushing the button? Have you ever met this situation?

When the receiver light has an external force, such as putting your hand over the receiver button, the light may be on even if you don't press the button. And when your hand moves, the brightness of the receiver button may also change. Therefore, it is normal that the effect of external force will have an impact on the receiver light. In fact we did a similar test before.