I bought a relay like this today for my raspberry pi, and I am encountering a very strange issue. I connected the 5v output to the VCC pin, the ground to ground and a GPIO pin to the IN pin on the relay. I opened python and assigned 'led' to 'LED(15)', which is very standard. THAT triggered the relay. If I run led.on() or led.off(), it makes no difference but assigning the gpio pin to a variable triggers it. Only when I run '(led = '')' thus unassigning the gpio pin from the variable, it disables the relay. Why is this? I am using the gpiozero library in python.