There is always some firmware running unless you keep the reset button pushed or the device is broken.
What happens to the LED when you keep the reset button pressed? If it is still on, there is a short somewhere. The RGB LEDs are active low. If it is off, something is configuring that I/O pin to output after reset.
Nothing is running within this module and neither broken anything nor it is responding when I pressing button. This same problem happening on three board not in one only.
May be this RGB lights are active low, somehow it is getting triggered by hardware. I didn't find the reason. Can you tell me why this module getting HOT while I power it although there's no shorting in power supply and other components.????