Question Coroutine not working after first time it is called?

Hello,
I have the following coroutine meant to make a picture go from 1 alpha to 0. It works on the first time that it is called, but every consecutive time it just stays 1.

Here is the script:
private IEnumerator RemoveScreenDarkening()
{
for (float i = _fadeTime; i >= 0; i -= Time.deltaTime)
{
Debug.Log("Darkener Remover Alpha: " + i/_fadeTime);
// set color with i as alpha
blackFadeCover.GetComponent<Image>().color = new Color(0, 0, 0, i / _fadeTime);
yield return null;
}
}

On the first time this is started it properly outputs into the log the alpha values from 1 to 0.

The second time it is run it only runs through the for loop once and outputs an alpha of 0. What could be causing this? I already trying to stop the previous coroutine before calling the new one and it didnt change.

Any help is much appreciated! Thank you!

 

Use your code tags. It's a button RIGHT THERE ON THE FORMATTING BAR, the only one with actual text telling you what it's for.

Are you starting this with

StartCoroutine(RemoveScreenDarkening())

? If the object which calls StartCoroutine gets disabled or destroyed, the coroutine will stop.

 

What you posted is not "your script" but just your coroutine. We don't know how you call it, where you call it and how you use it. Also you should use code tags when posting code.