Does my MATRIX Voice ESP32 Version burn down?

I bought the MATRIX Voice ESP32 a year ago and I’m really excited about what you can do with it. For a while now it is only connected via USB / Wifi and the audio streamers run with the software from Romkabouter. But now I have noticed that my board has become quite hot. But I don’t know when and why. See photo.

I am now insecure, does the board burn down now or is this normal after one year and I can continue to use it?

Has something like this ever happened to someone before?