Unity coroutine not yielding sometimes

Question

I'm making a 2D platformer controller and I want to implement a coyote time and buffered jump, the way I implement both is by setting a bool to true when either action is enabled like this:

private IEnumerator ApplyCoyote()
{
    isCoyote = true;
    yield return coyoteDelay;
    isCoyote = false;
}

So if you were to press jump while isCoyote is true you would jump. But every now and then the coroutine appears not to work and isCoyote becomes false immediately. I confirmed this by logging the changes to isCoyote and most of the time I can notice the delay between it becoming true and false plus the time on both logs is different, but when it fails it just prints them at the same time.

BTW I'm not disabling any scripts and I stop any previous calls to this coroutine before starting a new one

Answer 1

For making the coroutine wait for a few seconds before executing isCoyote = false, you will need to use new WaitForSeconds().

What this function does is it waits for that delay and then executes isCoyote = false.

Try this code:

private IEnumerator ApplyCoyote()
{
    isCoyote = true;
    yield return new WaitForSeconds(coyoteDelay);
    isCoyote = false;
}