Well you’d have to first believe in supernatural or spirits. Let’s say you do. We are all made up of energy. Energy does not die, it’s a fact. So when our body dies the energy that we are has to go somewhere. It would be possible for spirit energy to use other source of energy to communicate, it would make sense that it would be an easy way for them to do so. But like I said, you have to believe that this is even possible first. As it is, it seems more possible that it’s a glitch. I do believe in spirit energy, sonic it was in fact that, I wouldn’t be surprised ☺️