This situation might be due to the phone's key collision. Some phones would detect the positions of the buttons when they were pressed. If a button was in a specific area, it would think that it was a continuous button and try to perform the corresponding operation. If multiple buttons were in the same area, there would be a situation where the buttons collided, resulting in the button being unable to be executed or the execution was abnormal. In order to avoid this situation, you can try pressing other buttons to see if there are other problems. He could also try to adjust the position of the phone's buttons or change other buttons. If the problem still exists, you may need to contact the phone repairman to deal with it.